Knowlton's IronwoodO. Knowltoni, Cov.Knowlton's ironwood is found nowhere but in a thick grove on the southern slope of the canyon of the Colorado in Arizona, about seventy miles north of Flagstaff. Here these trees are numerous, crouching under oaks, their twisted branches ending in drooping twigs, bearing the characteristic pale green hops in autumn, small oval leaves, and the catkin flowers in spring. Such a restricted distribution for a distinct species of trees is unmatched in the annals of botany.THE BIRCHESGrace and gentility of appearance are attributes of this most interesting, attractive, and valuable family of trees.Shabbygentility, one may insist, thinking of the untidy, frayed-out edges that adorn the silky outer bark of almost every birch tree in the woods. (See illustration,page 102.) Not one of them, however, but lends a note of cheerfulness to the landscape. There is beauty and daintiness in leaf, flower, and winged seed, and despite the inferiority of most birch wood, the history of the family is a long story of usefulness to the human race.About thirty species of birches grow in the Northern Hemisphere, ten of them are North American. The white birch of Europe extends across the northern half of Asia, and is cultivated in delicate cut-leaved and weeping forms, as a lawn and park tree in this country.The Canoe BirchBetula papyrifera, Marsh.The canoe birch or paper birch is the noblest member of the family. (Seecover of book.) Ernest Thompson Seton calls it "The White Queen of the Woods—the source of food, drink, transport, and lodging to those who dwell in the forest—the most bountiful provider of all the trees." Then he enumerates the sweet syrup yielded by its sap; the meal made by drying and grinding the inner bark; the buds and catkins upon which the partridge feeds; and the outer bark, which is its best gift to primitive man."The broad sheets of this vegetable rawhide, ripped off when the weather is warm, and especially when the sap is moving, are tough, light, strong, pliant, absolutely waterproof, almost imperishable in the weather; free from insects, assailable only by fire. It roofs the settler's shack and the forest Indian's wigwam. It supplies cups, pails, pots, pans, spoons, boxes; under its protecting power the matches are safe and dry; split very thin, as is easily done, it is the writing paper of the woods, flat, light, smooth, waterproof, tinted, and scented; but the crowning glory of the birch is this—it furnishes the indispensable substance for the bark canoe, whose making is the highest industrial exploit of the Indian life."From the Atlantic to the Pacific, and from our northern tier of states to the arctic seas, woodsmen, red and white, have found this white-barked tree ready to their hand, their sure defense against death by cold and by starvation. The weather is never so wet but that shreds of birch barkburn merrily to start a campfire, and the timber of the trunk burns readily green or dry.The White BirchB. populifolia, Marsh.The white birch is a small, short-lived tree that grows in swampy ground, its bark chalky white or grayish, with triangular rough patches of black, where branches are or have been. (The canoe birch has a clean bole, chalky white, with none of these ugly black patches.)A vagabond tree it is, with thin pointed leaves and long pencil-like catkins and seed cones. The chief contributions of the poplar-leaved birch to the well-being of men are that it clothes with beauty the mostuninvitingsituations, and that it comes again, after fire or other general slaughter, promptly and abundantly, from stump and scattered seed.The Yellow BirchB. lutea, Michx.The yellow birch shows gleams of yellow under every rent in its gray, silky, frayed-out surface. Here is a timber tree of considerable size and value: its hard wood furnishes the frames of northern sledges; the knots and burs make good mallets; the curiously knotted roots show a curly grain, valuable to the cabinet-maker. From New England to Minnesota, and south along the Appalachian range, this tree is found, always telling its name by the color of its shaggy bark.The Red BirchB. nigra, Linn.Red birch or river birch wears its name in its chocolate-hued or terra-cotta bark, whose scaly surface flaunts a series of tattered fringes to the very twig ends. Tall and graceful fountains of living green, these birches lean over stream borders from Minnesota and New York to the Gulf of Mexico, and reach westward to the foothills of the Rockies. Close-grained and strong, the pale brown wood is used for furniture, shoe lasts, and a multitude of woodenwares. In the bayous of the lower Mississippi, where its roots and the base of the trunk are inundated for half the year, the tree reaches its greatest size. The cones stand erect and shed their heart-shaped, winged seeds in June—an exception to the autumn-fruiting of all other birches.The Cherry BirchB. lenta, Linn.The cherry birch has dark, irregularly checked bark like the wild cherry, but the oval, pointed leaf, the catkin flowers, and the cone fruits of its family. Birch beer is made of its aromatic sap and wintergreen oil is extracted from the leaves. Indians shred the inner bark and dry it in the spring when it is rich in starch and sugar. These shreds, like vermicelli, are boiled with fish and form a nourishing dish. The wood is heavy, hard, and close-grained, valuable for the manufacture of furniture and implements, especially wheel hubs, and for fuel. It is one of the handsomest, most symmetrical, and most luxuriantof all our birch trees, and a worthy addition to any park.THE ALDERSClosely related to the hornbeams and birches is a genus of small water-loving trees that grow rapidly and serve definite, special uses in the Old and New World. The genusalnusincludes twenty species, nine of which grow in North America; six of these reach the height of trees.The Black AlderAlnus glutinosa, Gaertn.Of the alders, the black alders of Europe is the largest and most important timber tree. Its range includes western Asia and northern Africa. It was introduced successfully into our Northeastern states in colonial times and has become naturalized in many localities. These trees sometimes reach seventy feet in height and a trunk diameter of three feet. Their dark green foliage, glutinous when the leaves unfold in the spring, ranks these giant alders among the beautiful and picturesque trees.The lumberman esteems alder wood only for special purposes. It grows in water and its wood resists decay better than any other kind when saturated through indefinite periods. In the old days it was the wood for the boat-builder. The piles of the Rialto in Venice and along the canals of Amsterdam and other Dutch cities are of black alder. Water pipes and troughs, pumps, barrel staves, kneading troughs, sabots and clogs were made of alder wood. The bark and cones are rich in tannin and a yellowdye used in making ink. Willow and alder make the best charcoal for gunpowder. Warty excrescences on old trees and twisted roots furnished the inlayer with small but beautifully veined and very hard pieces, beautiful in veneer work when polished. In America the black alder is often met in horticultural varieties. The daintiest are the cut-leaved forms, of whichimperialis, with leaves fingered like a white oak, is a good example.One of the best uses to which alders are put in Europe is planting in hedges along borders of streams, where their closely interlacing roots hold the banks from crumbling and keep the current clear in midstream. No English landscape is more beautiful than one through which a little river winds, its banks and the boggy spots tributary to it softened by billows of living green. "He who would see the alder in perfection must follow the banks of the Mole and Surrey through the sweet vales of Dorking and Wickleham."Seaside AlderA. maritima, Nutt.The seaside alder shares with the witch hazel the peculiar distinction of bearing its flowers and ripening its fruit simultaneously in the fall of the year. The alder comes first, hanging out its golden catkins in clusters on the ends of the season's shoots in August and September. Nothing is left of them when the witch hazel scatters its dainty stars along the twigs in October and November. The seaside alder follows stream borders near but not actually on the seacoast, through eastern Delaware and Maryland, but ranges comfortably on drier soil as far west as Oklahoma and is hardy in gardens and parks as farnorth as Boston, where it blooms profusely and is much admired for both flowers and glossy foliage through the late summer.Oregon AlderA. Oregona, Nutt.The Oregon or red alder reaches eighty feet in height and its trunk may exceed three feet in diameter. This Western tree exceeds the Old World alder in size. The smooth, pale-gray bark reminds us of the beech and sets this tree apart from the white alder whose bark is brown and deeply furrowed. The flowers and cone fruits are very large. The ovate leaves are cut-toothed and often lobed. This is the alder of the West Coast, largest where it comes down to the sea near the shores of Puget Sound, but climbing the mountains and canyon sides wherever there is water, from Sitka to Santa Barbara. The reddish brown wood is light, easily worked, and beautifully satiny when polished. In Washington and Oregon it is largely used in the manufacture of furniture. The Indian dug-outs are made of the butts of large trees.THE SYCAMORES, OR BUTTONWOODSThe ButtonwoodPlatanus occidentalis, Linn.Our eastern buttonwood is a tree to which, in America, we supply the name sycamore. Its European counterpart is the plane tree of the Old World. It is one of the easiest trees to recognize, for its most prominent trait isfairly shouted at us from a distance, whenever one of these trees comes within the range of our vision. The smooth bark that covers the branches is thin, very brittle, and has the habit of flaking off in irregular plates, leaving white patches under these plates that contrast sharply with the dingy olive of the unshed areas. On old trunks the bark is reddish brown and breaks into small, irregular plates; but above, and out among the branches, the tree looks downright untidy, and as though it had been splashed with whitewash by some careless painter. (See illustrations,pages 102-103.)White birches grow in copses in low ground, a whole regiment of their white stems slanting upward. But the ghostly sycamore is apt to stand alone along the river-courses, scattered among other water-loving trees. The tree is wayward in its branching habit, its twigs irregular and angular. When the leaves are gone, it is a distressed-looking object, dangling its seed-balls in the wind until the central, bony cob is bare, the seeds having all sailed away on their hairy parachutes.In the warmer South our buttonwood is a stalwart, large-limbed tree of colossal trunk, that shelters oaks and maples under its protecting arms. And there are some large specimens on Long Island.The buttonwood leaf in a general way resembles a maple's, being as broad as long, with three main lobes at the top. The leaf stem forms a tent over the bud formed in summer and containing the leafy shoot of the next year. The leaf scar, therefore, is a circle and the leaf base a hollow cone. At first a sheathing stipule, like a little leafy ruffle, grows at the base of each leaf, but this is shed before midsummer.Oriental PlaneP. Orientalis, Linn.The oriental plane is almost as familiar a tree as our native species, for it is planted as a street tree in every city and village, and is a favorite shade and lawn tree besides. The city of Washington has set the example and so has Philadelphia. One third of the street trees of Paris are plane trees.The chief merits of this tree immigrant are its perfect hardiness, its fine, symmetrical, compact pyramid, its freedom from injury by smoke and dust, and its rapid growth in the poor soil of the parkings of city and village. In leaf and fruit and bark-shedding habit, it is easily recognized as a sycamore, though in this species more than one ball dangles from each stem.The exactions of city life limit the number of tree species that will do well. Our native sycamore patiently endures the foul breath of factory chimneys, and helps, in the smallest, downtown city parks, to make green oases in burning deserts of brick and stone pavements. But it is subject to the ravages of insect and fungous enemies to a greater extent than the oriental species.THE GUM TREESSouthern people talk more about "gum trees" than people in the North. Two of our three native species of Nyssa belong solely to southern swamps, and the third, which comes north to Canada, is oftener called by othernames. All these trees are picturesque, with twiggy, contorted branches; tough, cross-grained wood; alternate, simple, leathery, but deciduous leaves, beautiful at all seasons; minute flowers and fleshy, berry-like fruits.The Sour, or Black, GumNyssa sylvatica, Marsh.The sour or black gum of the South has a wide range, being hardy to southern Ontario and Maine. To the New Englander this is the "pepperidge"; the Indians called it "tupelo"; but the woodsman, North and South, calls it the gum tree, as a rule. "Black gum" refers to its dark gray, rough bark, which is broken into many-sided plates. By this, it is easily distinguished from the "red gum" or liquid amber, which grows in the same situations, but is not related to it. "Sour gum" refers to the acid, blue-black berries, one to three in a cluster, ripe in October.We shall know this tree by its tall, slender trunk, clothed with short, ridged, full-twigged, horizontal branches. With no claim to symmetry, the black gum is a striking and picturesque figure in winter. It is beautiful in summer, covered with the dark polished leaves, two to four inches long. In autumn patches of red appear as the leaves begin to drop. This is the tupelo's signal that winter is coming. Soon the tree is a pillar of fire against yellowing ashes and hickories. The reds of the swamp maple and scarlet oak are brighter, but no tree has a richer color than this one. A spray brought in to decorate the mantelpiece lasts till Christmas holly displaces it. The leaves, being leathery, do not curl and dry, as do thin maple leaves, in the warm air of the house.The Cotton GumN. aquatica, Marsh.The cotton gum is draped in cottony white down as the new shoots start and the leaves unfold in spring. In midsummer this down persists in the leaf-linings, lightening the dark green of the tree-tops. The dark blue fruits of this species have no culinary value. The wood is used for crating material. The tree reaches its maximum height—one hundred feet—in the cypress swamps of Louisiana and Texas, its abundant, corky roots adapting it to its habitat.The Sweet GumLiquidamber styraciflua, Linn.The sweet gum is a tall tree with a straight trunk, four to five feet in diameter, with slender branches covered with corky bark thrown out in wing-like ridges. At first the head is regular and pyramidal, but in old age it becomes irregularly oblong and comparatively narrow. The bark is reddish brown, deeply furrowed between rough scaly plates, marked by hard, warty excrescences.The leaves are lobed like a maple's, but more regularly, so as to form a five-pointed star. Brilliant green in summer, they become streaked with crimson and yellow. Wherever these gum trees grow, the autumn landscape is painted with the changeful splendor of the most gorgeous sunset. "The tree is not a flame, it is aconflagration!" Often along a country road the rail fence is hidden by an undergrowth of young gum trees. Their polished starleaves may pass from green into dull crimsons and then into lilacs and so to brown, or they may flame into scarlets and orange instead. Always, the foliage of the sweet gum falls before it loses its wonderful colors.The flowers of the sweet gum are knobby little bunches; the swinging balls covered with curving horns contain the winged seeds, small but shaped like the key of the maple. One recognizes the gum tree in winter by these swinging seed-balls, an inch in diameter, like the balls of the buttonwood, except that those are smooth. (See illustrations,pages 102-103.) The best distinguishing mark of sweet gums in winter are the corky ridges on the branches, and the star-shaped leaves under the trees. Sweet gum sap is resinous and fragrant. Chip through the bark, and an aromatic gum soon accumulates in the wound. The farther South one goes, the more copious is the exudation. In Mexico a Spanish explorer described, in 1651, "large trees that exude a gum like liquid amber." This is the "copalm balm" gathered and shipped each year to Europe from New Orleans and from Mexican ports. The fragrant gum,storaxorstyrax, derived from forests of the oriental sweet gum in Asia Minor, is used as incense in temples of various oriental religions. It blends with frankincense and myrrh in the censers of Greek and Roman Catholic churches. It is used in medicines also, and as a dry gum is the standard glove perfume in France.Beautiful and interesting in every stage of growth, our native sweet gums are planted largely in the parks of Europe and are earning recognition at home, through the efforts of tree-lovers who would make the most of native species in ornamental planting.The name, gum tree, is applied to our tupelos, and to thegreat tribe of Australian eucalyptus trees, now largely planted in the Southwest.The Osage OrangeToxylon pomiferum, Raff.Related to figs and mulberries, but solitary in the genustoxylon, is the osage orange, a handsome round-headed tree, native of eastern North America, whose fleshy roots and milky, bitter, rubbery sap reveal its family connections with the tropical rubber plants. (See illustration,page 119.) The fruits are great yellow-green globes, four to five inches in diameter, covered on the outside by crowded, one-seeded berries. This compound fruit reveals the tree's relationship to both figs and mulberries.The aborigines, especially of the Osage tribe, in the middle Mississippi Valley, cherished these trees for their orange-yellow wood, which is hard, heavy, flexible, and strong—the best bow-wood to be found east of the Rocky Mountains. When the settlers came the sharp thorns with which the branches are effectually armed appealed strongly to the busy farmers and the tree was widely planted for hedges. Nurserymen produced them by thousands, from cuttings of root and branch. These trees made rapid growth and seemed most promising as a solution of the fencing problem, but they did not prove hardy in Iowa and neighboring states. Even now remnants of those old winter-killed hedges may be found on farm boundaries, individual trees having been able to survive.The native osage orange timber is about all gone, for the rich bottom lands where it once grew most abundantly in Oklahoma and Texas have been converted into farm land.However, the growing of osage orange timber for posts is on the increase. Systematically maintained, plantations pay well. The wood is exceptionally durable in soil. Good prices are paid for posts in local markets. Twenty-five posts can be grown to the rod in rows of a plantation; they grow rapidly and send up new shoots from the roots.The brilliant, leathery leaves and conspicuous green fruits make this native bow-wood a very striking lawn tree. It holds its foliage well into the autumn and turns at length into a mass of gold. It harbors few insects, has handsome bark, and is altogether a distinguished, foreign-looking tree.Experiments of feeding osage orange leaves to silkworms have been successfully made at different times, but nowhere in America has silk culture succeeded. Since the white mulberry is hardy here and its foliage is the basis of the silk-growing industry in the Old World, it is futile to look for substitutes in the osage orange or any other tree.PART IVTREES WITH SHOWY FLOWERS AND FRUITSThe Magnolias—The Dogwoods—The Viburnums—The Mountain Ashes—The Rhododendron—The Mountain Laurel—The Madroña—The Sorrel Tree—The Silver Bell Trees—The Sweet Leaf—The Fringe Tree—The Laurel Family—The Witch Hazel—The Burning Bush—The Sumachs—The Smoke Tree—The HolliesTHE MAGNOLIASFour of the ten genera in the magnolia family are represented in North America. Of these, two are trees. All are known by their large, simple, alternate leaves, with margins entire; their showy, solitary, terminal flowers, perfect and with all parts distinct; and their cone-like fruits, compounded of many one- or two-seeded follicles, shingling over each other upon a central spike. The wood is soft and light throughout the family, and the roots are fleshy. The sap is watery and the bark is bitter and aromatic.The genusmagnolia, named by Linnaeus in honor of Pierre Magnol, a French botanist, includes twenty species; twelve are native to eastern and southern Asia, two to Mexico, and six to eastern North America. They are ofpeculiar interest to horticulturists and to the general public, because they have the largest flowers of any trees in cultivation. A white blossom from six inches to a foot across is bound to attract attention and admiration when set off by a whorl of lustrous evergreen leaves. The petals of most magnolia blossoms are notably thick and waxy in texture and deliciously fragrant. Last but not least are the cone-like fruits, which flush from pale green to rose as they ripen against the dark, leathery foliage; at maturity their follicles open in a peculiar fashion and hang out their bright red seeds on slender elastic threads. Foliage, flowers, or cones alone would make magnolias superb as ornamental trees. All these qualities combined have given them a preëminent place in every country where ornamental planting is done. North America is fortunate in having so large a number of species that assume tree form.When you see a magnolia in the North blossoming before the leaves, you may be sure it is an exotic species, and if the flowers are colored you may be equally sure that it is a hybrid between two oriental species, and belongs to the group of which the type isM. Soulangeana. The owner may be a magnolia enthusiast, able to show you on his premises both parents of this interesting and beautiful hybrid.Seepage 87THE TATTERED, SILKY BARK OF THE BIRCHESSeepage 93BLOTCHED BARK OF THE SYCAMORE, AND THE SEED-BALLS THAT HANG ON ALL WINTERSeepage 97THE WARTY, RIDGED BARK, THE SWINGING SEED-BALLS, AND THE WINGED SEEDS OF THE SWEET GUMSeepage 109TULIP TREE, FLOWER AND LEAVESYulan MagnoliaMagnolia YulanThe Yulan magnolia, for centuries a favorite in Japanese gardens, covers itself before the leaves appear with pure white, fragrant flowers, bell-shaped and fully six inches across. In our Eastern gardens it is quite as much at home, and though young trees are oftenest seen, the older specimens are as large as any native magnolia. This is one parent. The other is but a shrub, the purple magnolia,M. obovata, that must be protected against the rigors of our Northern winters. It blooms in May or June, and its purple flowers, with rosy linings, are relatively small and almost scentless. The children of this parentage get their tints of pink and rose and crimson from this purple magnolia shrub.Splendid, hardy, fragrant, big-flowered varieties have arisen from this cross. All are small trees, suitable for planting in city yards, where they are decorative throughout the season.Starry MagnoliaM. stellataThe starry magnolia blooms in March or April, covering itself with star-shaped white flowers made of strap-like petals that form a flat whorl instead of a cup. This is the earliest magnolia and wonderfully precocious, blooming when scarcely two feet high.The Southern states can grow the splendid Campbell's magnolia, which is in its glory in the high mountain valleys of the Himalayas, where it reaches one hundred feet in height. The fragrant flower-cups, from six to ten inches in diameter, shade from pink to crimson. It is rare in cultivation because it is not easy to grow, and northern horticulturists fail utterly to grow it outdoors; but the fact that it is the most beautiful of all exotic species must encourage its culture in the South, and difficulties will be overcome when the tree's peculiar needs are fully understood.The Great Laurel MagnoliaM. foetida, Sarg.The great laurel magnolia is oftenest seen in cultivation as a small tree of pyramidal or conical habit, with stiff, ascending branches, bearing a lustrous mass of leathery oval leaves, five to eight inches long, lined with dull green, or with rusty down, persistent until the second spring. When small these magnolia trees are as conventional as the rubber plants in hotel lobbies, whose foliage resembles theirs. But in the forests of Louisiana, where this tree reaches its greatest perfection, it earns the characterization that Sargent gave it, "the most splendid ornamental tree in the American forests." With a trunk four feet thick, and its head lifted from fifty to eighty feet above the ground and with each leaf cluster holding up a great white flower, waxy as a camellia, seven to eight inches across, the tree is indeed superb. William Bartram likened these flowers to great white roses, distinctly visible from a distance of a mile.The purple heart of the flower, made by a spot of color at the base of each petal, and the overpowering odor, rather sickening as the flowers fade, lure insects to the nectar store at the bottom of the flower-cup. This odor, disagreeable to many people, is the one objection to this flower when brought indoors. A drawback that florists discover is that the slightest bruise of the waxy petals produces a brownish discoloration, which prevents the shipment of these flowers. The splendid foliage, however, travels perfectly, and a new and growing industry is the gathering of magnolia branches in Southern woods forChristmas decoration. These branches are offered in all Northern cities, and this demand threatens the extinction of the tree, which until comparatively recent years has enjoyed immunity because of the worthlessness of its soft wood.The tree's natural range is from the North Carolina coast to Tampa Bay, and west along the Gulf Coast to Texas and southern Arkansas. As an ornamental tree, it is safely planted in Philadelphia, but its life is precarious farther north. It is widely grown in southern California as a street tree, notably in Pasadena and in parks and gardens for its blossoms, foliage, and fuzzy, horny cones.The Swamp BayM. glauca, Linn.The swamp bay has lustrous, bright green leaves with silvery linings. In Florida and across to Texas and Arkansas it grows into a superb evergreen tree, fifty to seventy-five feet in height. Northward along the Atlantic Coast its growth is stunted as the climate becomes more rigorous, until it reaches Massachusetts and Long Island, where it becomes a many-stemmed shrub, whose beautiful leaves fall in the autumn. On the streets of cities near the New Jersey swamps the flowers of the swamp bay are offered for sale in May. The buds are almost globular, and each one is surrounded by a cluster of new leaves. To spring back these waxy white petals, that are marred by a touch, is criminal; but it is the common practice with boys who hawk these flowers on the streets. Most of the charm is gone from flowers thus defiled by dingy fingers.The finest flowers are borne on strong young shoots. The florists collect and handle them with extreme care. Much of the swamp land now useless along the Atlantic seaboard could be profitably planted to this magnolia, for the florist trade alone. The flowers bloom slowly through a period of several weeks. The enterprising owner of tracts planted to swamp bay could reap two harvests a year, almost from the first season: the flowers in spring and the leafy shoots for holiday decorations. In the South the leaves are evergreen.The Large-leaved Cucumber TreeM. macrophylla, Michx.The large-leaved cucumber tree exceeds all other magnolias in the size of its leaves and flowers. In fact, no tree outside the tropics can match it, for its blades are almost a yard in length. The flowers are great white bowls, sometimes a foot across, made of six white waxy petals, much broader than the three protecting sepals outside. The inner petals have purple spots at the base. The fruits are almost globular, two to three inches long, turning red as they mature, equally showy when the scarlet seeds dangle from the open follicles.These trees are at home in fertile valleys among the foothills of the Alleghanies, from North Carolina to middle Florida, and west to central Arkansas. Their range is not continuous. They occur in scattered groups that have come from seed.The horticulturist has greatly aided nature in the spread of this tree in this country and in Europe, where its flowers and leaves attract universal attention. The mistakeusually made is to plant it in the middle of a lawn where the wind lashes the broad leaves into ribbons before they have reached their full size. Every twig or leaf that touches a petal mars it with a brown bruise. The only way to enjoy one of these remarkable trees is to plant it in the most sheltered situation, where the sunshine will reach it and the breezes will not. Then the silver-lined foliage and the superb white blossoms can come to perfection and the sight is worth going miles to see.The Cucumber TreeM. acuminata, Linn.The cucumber tree is the hardiest of our native magnolias, tropical-looking by reason of its heart-shaped leaves, six to ten inches long. Its chosen habitat is rocky uplands, where the fleshy roots can find moist soil. It ranges from western New York to Illinois, Kentucky, and Arkansas, and follows the mountain foothills through Pennsylvania and Tennessee into Alabama and Mississippi.The flowers are like tulips, and though large can scarcely be seen among the new leaves, because they are all yellowish green in color. The petals are leaf-like and the flowers have no fragrance to make up for their lack of beauty. Imperfect pollination results in distorted, fleshy cones that resemble cucumbers that have twisted and shrunken in spots as they grew. These fruits turn from pink to red as they mature, redeeming their ugly shape by their vivid color as the leaves turn yellow. In September, the scarlet seeds hang out and the wind whips them until they dangle several inches below the fruit. One by one they drop and new cucumber trees come up from this planting.The wood of the cucumber tree is light, close-textured, weak, and pale brown in color. It has only local use in cabinet-making and for flooring. The tree is far more valuable in horticulture. It is a splendid stock on which to graft less hardy magnolias. It is a superb avenue and shade tree for Northern cities, and in this capacity it is as yet little known. It grows vigorously from seed, and stands transplanting, if care is used that the brittle roots are not mutilated nor dried.The Umbrella TreeM. tripetala, Linn.The umbrella tree has an umbrella-like whorl of leaves surrounding the flower whose white cup stands above three recurving white sepals. The whole tree suggests an umbrella, so closely thatched is its dome of thin, bright green leaves.The stout contorted branches and twigs lack symmetry, from the forking habit. Side twigs strike out at right angles from an erect branch, then turn up into a position parallel with the parent branch, and bear terminal flowers, which induce another branching system the following year. Despite its angularity this is the trimmest and one of the handsomest of our native magnolias, and it has the merit of hardiness even in New England, where it attains large size. Its native range extends from Pennsylvania near the coast, along the Atlantic seaboard, and westward to southern Alabama and Arkansas. It loves swamp borders and the banks of mountain streams, but behaves well in the moderately rich soil of parks and gardens.The Tulip TreeLiriodendron tulipifera, Linn.The tulip tree is a cousin, rather than a sister, to the foregoing magnolias. It stands alone in its genus in America, but has a sister species that grows in the Chinese interior. A tall, stately forest tree, it reached two hundred feet in height, and a trunk diameter of ten feet, in the lower Ohio Valley, when it was covered with virgin forest. This species still holds its own as a valuable lumber tree on mountain slopes of North Carolina and Tennessee. Smaller, but still stately and beautiful, it is found in woods from Vermont to Florida and west to Illinois, Arkansas, and Mississippi.In Europe the tulip tree has been a favorite since its discovery and exportation by the American colonists. More and more it is coming to be appreciated at home as a lawn and shade tree, for there is no time in the year when it is not full of interest and beauty, and no time in its life when it is not a distinct and beautiful addition to any plantation.In the dead of winter young tulip trees are singularly straight and symmetrical compared with saplings of other trees. There is usually a grove of them, planted by some older tree that towers overhead, and still holds up its shiny cones, that take months to give up their winged seeds. The close, thick, intricately furrowed bark of the parent tree contrasts sharply with the smooth rind of its branches and the stems of the saplings. Tulip trees are trim as beeches until the trunks are old.The winter twigs are set with oblong blunt leaf-buds. The terminal one contains the flower, when the tree is oldenough to bloom. (See illustration,page 103.) In spring the terminal buds of saplings best show the peculiarity of the tree's vernation. Two green leaves with palms together form a flat bag that encloses the new shoot. Hold this bag up to the light and you see, as a shadow within, a curved petiole and leaf. The bag opens along its edge seam, the leaf-stem straightens, lifting the blade which is folded on the midrib. At the base of the petiole stands a smaller flat green bag. As the leaf grows to maturity the basal palms of its protecting bag shrivel and fall away, leaving the ring scar around the leaf base.Now the growing shoot has carried up the second bag, which opens and another leaf expands, sheds its leafy stipules, and a third follows. The studies of this unique vernation delight children and grown-ups. It is absolutely unmatched in the world of trees.The leathery blades of the tulip tree are from four to six inches broad and long, with basal lobes, like those of a maple leaf, and the end chopped off square. Occasionally there is a notch, made by the two end lobes projecting a trifle beyond the midrib. The leaves are singularly free from damage, keeping their dark lustrous beauty through the summer, and turning to clear yellow before they fall.The winged seeds fall first from the top of the erect cones, the wind whirling them far, because the flat blades are long and the seed-cases light—many of them empty in fact. Far into winter a tulip tree seems to be blossoming, because its bare branches are tipped with the remnants of the seed cones, faded and shining almost white against the dark branches.Tulip wood is soft and weak, pale brown, and light in weight. It is easily worked and is used locally for houseand boat-building. Wood pulp consumes much of the yearly harvest. It is known as "poplar," whose wood it resembles. Ordinary postal cards are made of it. The bark yields a drug used as a heart stimulant.THE DOGWOODSFoliage of exceptional beauty is the distinguishing trait of the trees in the cornel family, from the standpoint of the landscape gardener and the lover of the woods. Showy flowers and fruit belong to some of the species; extremely hard, close-textured wood belongs to all; and this means slow growth, which is a limitation in the eyes of the planter who wishes quick results. But he who plants a cornel tree and watches it season after season, finds it one of the most interesting of nature studies through the whole round of the year.The dogwoods are slender-twigged trees of small size, with simple, entire leaves, strongly ribbed, and with one exception, set opposite upon the twigs. Fifty species are distributed over the Northern Hemisphere; one crosses the equator into Peru. Four of the seventeen species found in the United States are trees; the rest are shrubs, one of them the low-growing bunchberry of our Northern woods.The Flowering DogwoodCornus florida, Linn.The flowering dogwood (see illustration,page 134) is a little tree whose round, bushy, flat-topped head is made of short, horizontal branches. The twigs hold erect in the wintera multitude of buds, large, squat, enclosed in four scales, like the husk of a hickory nut. All the delicate tints that the water-colorist delights in are found in these buds and the twigs that bear them. When spring comes, these scales loosen, expand, turn green, then fade into pure white—forming the four banners, ordinarily called petals—of the bloom of the dogwood. The true flowers are small and clustered in the centre. These white expanses are merely modified bud scales, the botanist will tell you, and the notch at the end is where the horny winter scale broke away, while its base was growing into the large white palm.From March till May one finds the dogwood clothed in white (see illustration,page 118), and the glossy leaves passing through changing hues from rose to green. The wayward arrangement of the blossoms on the branch is the delight of artists. Lured by the white signals, bees and other nectar-loving insects come to the flowers, cross-fertilizing them while they supply their own needs. In midsummer the pale green clusters of berries replace the flowers, and when in autumn the foliage, still glossy and smooth, changes to crimson and scarlet, the berries are brighter still, until the birds have taken every one.The bark of the dogwood is checkered like alligator skin but with deep furrows that make it very rough. The wood is used for wood engraving blocks, for tool handles, hubs, and cogs. But it is becoming very scarce. The deplorable destruction of the dogwoods comes not so much from the lumberman as from the irresponsible people who tear the trees to pieces in blossoming time. The wanton mutilation of the dogwoods in natural woodlands belonging to cities can be curbed only by policing the tracts. Thesaving of every flowering dogwood tree is a duty owed to his community by every wood-lot owner within the range of this hardy, handsome tree. Though exterminated over much of its range, it is able and willing to grow in any state east of the Mississippi River. It is one of the most deservedly popular trees planted for ornament in this country and in Europe.
Knowlton's Ironwood
O. Knowltoni, Cov.
Knowlton's ironwood is found nowhere but in a thick grove on the southern slope of the canyon of the Colorado in Arizona, about seventy miles north of Flagstaff. Here these trees are numerous, crouching under oaks, their twisted branches ending in drooping twigs, bearing the characteristic pale green hops in autumn, small oval leaves, and the catkin flowers in spring. Such a restricted distribution for a distinct species of trees is unmatched in the annals of botany.
THE BIRCHES
Grace and gentility of appearance are attributes of this most interesting, attractive, and valuable family of trees.Shabbygentility, one may insist, thinking of the untidy, frayed-out edges that adorn the silky outer bark of almost every birch tree in the woods. (See illustration,page 102.) Not one of them, however, but lends a note of cheerfulness to the landscape. There is beauty and daintiness in leaf, flower, and winged seed, and despite the inferiority of most birch wood, the history of the family is a long story of usefulness to the human race.
About thirty species of birches grow in the Northern Hemisphere, ten of them are North American. The white birch of Europe extends across the northern half of Asia, and is cultivated in delicate cut-leaved and weeping forms, as a lawn and park tree in this country.
The Canoe Birch
Betula papyrifera, Marsh.
The canoe birch or paper birch is the noblest member of the family. (Seecover of book.) Ernest Thompson Seton calls it "The White Queen of the Woods—the source of food, drink, transport, and lodging to those who dwell in the forest—the most bountiful provider of all the trees." Then he enumerates the sweet syrup yielded by its sap; the meal made by drying and grinding the inner bark; the buds and catkins upon which the partridge feeds; and the outer bark, which is its best gift to primitive man.
"The broad sheets of this vegetable rawhide, ripped off when the weather is warm, and especially when the sap is moving, are tough, light, strong, pliant, absolutely waterproof, almost imperishable in the weather; free from insects, assailable only by fire. It roofs the settler's shack and the forest Indian's wigwam. It supplies cups, pails, pots, pans, spoons, boxes; under its protecting power the matches are safe and dry; split very thin, as is easily done, it is the writing paper of the woods, flat, light, smooth, waterproof, tinted, and scented; but the crowning glory of the birch is this—it furnishes the indispensable substance for the bark canoe, whose making is the highest industrial exploit of the Indian life."
From the Atlantic to the Pacific, and from our northern tier of states to the arctic seas, woodsmen, red and white, have found this white-barked tree ready to their hand, their sure defense against death by cold and by starvation. The weather is never so wet but that shreds of birch barkburn merrily to start a campfire, and the timber of the trunk burns readily green or dry.
The White Birch
B. populifolia, Marsh.
The white birch is a small, short-lived tree that grows in swampy ground, its bark chalky white or grayish, with triangular rough patches of black, where branches are or have been. (The canoe birch has a clean bole, chalky white, with none of these ugly black patches.)
A vagabond tree it is, with thin pointed leaves and long pencil-like catkins and seed cones. The chief contributions of the poplar-leaved birch to the well-being of men are that it clothes with beauty the mostuninvitingsituations, and that it comes again, after fire or other general slaughter, promptly and abundantly, from stump and scattered seed.
The Yellow Birch
B. lutea, Michx.
The yellow birch shows gleams of yellow under every rent in its gray, silky, frayed-out surface. Here is a timber tree of considerable size and value: its hard wood furnishes the frames of northern sledges; the knots and burs make good mallets; the curiously knotted roots show a curly grain, valuable to the cabinet-maker. From New England to Minnesota, and south along the Appalachian range, this tree is found, always telling its name by the color of its shaggy bark.
The Red Birch
B. nigra, Linn.
Red birch or river birch wears its name in its chocolate-hued or terra-cotta bark, whose scaly surface flaunts a series of tattered fringes to the very twig ends. Tall and graceful fountains of living green, these birches lean over stream borders from Minnesota and New York to the Gulf of Mexico, and reach westward to the foothills of the Rockies. Close-grained and strong, the pale brown wood is used for furniture, shoe lasts, and a multitude of woodenwares. In the bayous of the lower Mississippi, where its roots and the base of the trunk are inundated for half the year, the tree reaches its greatest size. The cones stand erect and shed their heart-shaped, winged seeds in June—an exception to the autumn-fruiting of all other birches.
The Cherry Birch
B. lenta, Linn.
The cherry birch has dark, irregularly checked bark like the wild cherry, but the oval, pointed leaf, the catkin flowers, and the cone fruits of its family. Birch beer is made of its aromatic sap and wintergreen oil is extracted from the leaves. Indians shred the inner bark and dry it in the spring when it is rich in starch and sugar. These shreds, like vermicelli, are boiled with fish and form a nourishing dish. The wood is heavy, hard, and close-grained, valuable for the manufacture of furniture and implements, especially wheel hubs, and for fuel. It is one of the handsomest, most symmetrical, and most luxuriantof all our birch trees, and a worthy addition to any park.
THE ALDERS
Closely related to the hornbeams and birches is a genus of small water-loving trees that grow rapidly and serve definite, special uses in the Old and New World. The genusalnusincludes twenty species, nine of which grow in North America; six of these reach the height of trees.
The Black Alder
Alnus glutinosa, Gaertn.
Of the alders, the black alders of Europe is the largest and most important timber tree. Its range includes western Asia and northern Africa. It was introduced successfully into our Northeastern states in colonial times and has become naturalized in many localities. These trees sometimes reach seventy feet in height and a trunk diameter of three feet. Their dark green foliage, glutinous when the leaves unfold in the spring, ranks these giant alders among the beautiful and picturesque trees.
The lumberman esteems alder wood only for special purposes. It grows in water and its wood resists decay better than any other kind when saturated through indefinite periods. In the old days it was the wood for the boat-builder. The piles of the Rialto in Venice and along the canals of Amsterdam and other Dutch cities are of black alder. Water pipes and troughs, pumps, barrel staves, kneading troughs, sabots and clogs were made of alder wood. The bark and cones are rich in tannin and a yellowdye used in making ink. Willow and alder make the best charcoal for gunpowder. Warty excrescences on old trees and twisted roots furnished the inlayer with small but beautifully veined and very hard pieces, beautiful in veneer work when polished. In America the black alder is often met in horticultural varieties. The daintiest are the cut-leaved forms, of whichimperialis, with leaves fingered like a white oak, is a good example.
One of the best uses to which alders are put in Europe is planting in hedges along borders of streams, where their closely interlacing roots hold the banks from crumbling and keep the current clear in midstream. No English landscape is more beautiful than one through which a little river winds, its banks and the boggy spots tributary to it softened by billows of living green. "He who would see the alder in perfection must follow the banks of the Mole and Surrey through the sweet vales of Dorking and Wickleham."
Seaside Alder
A. maritima, Nutt.
The seaside alder shares with the witch hazel the peculiar distinction of bearing its flowers and ripening its fruit simultaneously in the fall of the year. The alder comes first, hanging out its golden catkins in clusters on the ends of the season's shoots in August and September. Nothing is left of them when the witch hazel scatters its dainty stars along the twigs in October and November. The seaside alder follows stream borders near but not actually on the seacoast, through eastern Delaware and Maryland, but ranges comfortably on drier soil as far west as Oklahoma and is hardy in gardens and parks as farnorth as Boston, where it blooms profusely and is much admired for both flowers and glossy foliage through the late summer.
Oregon Alder
A. Oregona, Nutt.
The Oregon or red alder reaches eighty feet in height and its trunk may exceed three feet in diameter. This Western tree exceeds the Old World alder in size. The smooth, pale-gray bark reminds us of the beech and sets this tree apart from the white alder whose bark is brown and deeply furrowed. The flowers and cone fruits are very large. The ovate leaves are cut-toothed and often lobed. This is the alder of the West Coast, largest where it comes down to the sea near the shores of Puget Sound, but climbing the mountains and canyon sides wherever there is water, from Sitka to Santa Barbara. The reddish brown wood is light, easily worked, and beautifully satiny when polished. In Washington and Oregon it is largely used in the manufacture of furniture. The Indian dug-outs are made of the butts of large trees.
THE SYCAMORES, OR BUTTONWOODS
The Buttonwood
Platanus occidentalis, Linn.
Our eastern buttonwood is a tree to which, in America, we supply the name sycamore. Its European counterpart is the plane tree of the Old World. It is one of the easiest trees to recognize, for its most prominent trait isfairly shouted at us from a distance, whenever one of these trees comes within the range of our vision. The smooth bark that covers the branches is thin, very brittle, and has the habit of flaking off in irregular plates, leaving white patches under these plates that contrast sharply with the dingy olive of the unshed areas. On old trunks the bark is reddish brown and breaks into small, irregular plates; but above, and out among the branches, the tree looks downright untidy, and as though it had been splashed with whitewash by some careless painter. (See illustrations,pages 102-103.)
White birches grow in copses in low ground, a whole regiment of their white stems slanting upward. But the ghostly sycamore is apt to stand alone along the river-courses, scattered among other water-loving trees. The tree is wayward in its branching habit, its twigs irregular and angular. When the leaves are gone, it is a distressed-looking object, dangling its seed-balls in the wind until the central, bony cob is bare, the seeds having all sailed away on their hairy parachutes.
In the warmer South our buttonwood is a stalwart, large-limbed tree of colossal trunk, that shelters oaks and maples under its protecting arms. And there are some large specimens on Long Island.
The buttonwood leaf in a general way resembles a maple's, being as broad as long, with three main lobes at the top. The leaf stem forms a tent over the bud formed in summer and containing the leafy shoot of the next year. The leaf scar, therefore, is a circle and the leaf base a hollow cone. At first a sheathing stipule, like a little leafy ruffle, grows at the base of each leaf, but this is shed before midsummer.
Oriental Plane
P. Orientalis, Linn.
The oriental plane is almost as familiar a tree as our native species, for it is planted as a street tree in every city and village, and is a favorite shade and lawn tree besides. The city of Washington has set the example and so has Philadelphia. One third of the street trees of Paris are plane trees.
The chief merits of this tree immigrant are its perfect hardiness, its fine, symmetrical, compact pyramid, its freedom from injury by smoke and dust, and its rapid growth in the poor soil of the parkings of city and village. In leaf and fruit and bark-shedding habit, it is easily recognized as a sycamore, though in this species more than one ball dangles from each stem.
The exactions of city life limit the number of tree species that will do well. Our native sycamore patiently endures the foul breath of factory chimneys, and helps, in the smallest, downtown city parks, to make green oases in burning deserts of brick and stone pavements. But it is subject to the ravages of insect and fungous enemies to a greater extent than the oriental species.
THE GUM TREES
Southern people talk more about "gum trees" than people in the North. Two of our three native species of Nyssa belong solely to southern swamps, and the third, which comes north to Canada, is oftener called by othernames. All these trees are picturesque, with twiggy, contorted branches; tough, cross-grained wood; alternate, simple, leathery, but deciduous leaves, beautiful at all seasons; minute flowers and fleshy, berry-like fruits.
The Sour, or Black, Gum
Nyssa sylvatica, Marsh.
The sour or black gum of the South has a wide range, being hardy to southern Ontario and Maine. To the New Englander this is the "pepperidge"; the Indians called it "tupelo"; but the woodsman, North and South, calls it the gum tree, as a rule. "Black gum" refers to its dark gray, rough bark, which is broken into many-sided plates. By this, it is easily distinguished from the "red gum" or liquid amber, which grows in the same situations, but is not related to it. "Sour gum" refers to the acid, blue-black berries, one to three in a cluster, ripe in October.
We shall know this tree by its tall, slender trunk, clothed with short, ridged, full-twigged, horizontal branches. With no claim to symmetry, the black gum is a striking and picturesque figure in winter. It is beautiful in summer, covered with the dark polished leaves, two to four inches long. In autumn patches of red appear as the leaves begin to drop. This is the tupelo's signal that winter is coming. Soon the tree is a pillar of fire against yellowing ashes and hickories. The reds of the swamp maple and scarlet oak are brighter, but no tree has a richer color than this one. A spray brought in to decorate the mantelpiece lasts till Christmas holly displaces it. The leaves, being leathery, do not curl and dry, as do thin maple leaves, in the warm air of the house.
The Cotton Gum
N. aquatica, Marsh.
The cotton gum is draped in cottony white down as the new shoots start and the leaves unfold in spring. In midsummer this down persists in the leaf-linings, lightening the dark green of the tree-tops. The dark blue fruits of this species have no culinary value. The wood is used for crating material. The tree reaches its maximum height—one hundred feet—in the cypress swamps of Louisiana and Texas, its abundant, corky roots adapting it to its habitat.
The Sweet Gum
Liquidamber styraciflua, Linn.
The sweet gum is a tall tree with a straight trunk, four to five feet in diameter, with slender branches covered with corky bark thrown out in wing-like ridges. At first the head is regular and pyramidal, but in old age it becomes irregularly oblong and comparatively narrow. The bark is reddish brown, deeply furrowed between rough scaly plates, marked by hard, warty excrescences.
The leaves are lobed like a maple's, but more regularly, so as to form a five-pointed star. Brilliant green in summer, they become streaked with crimson and yellow. Wherever these gum trees grow, the autumn landscape is painted with the changeful splendor of the most gorgeous sunset. "The tree is not a flame, it is aconflagration!" Often along a country road the rail fence is hidden by an undergrowth of young gum trees. Their polished starleaves may pass from green into dull crimsons and then into lilacs and so to brown, or they may flame into scarlets and orange instead. Always, the foliage of the sweet gum falls before it loses its wonderful colors.
The flowers of the sweet gum are knobby little bunches; the swinging balls covered with curving horns contain the winged seeds, small but shaped like the key of the maple. One recognizes the gum tree in winter by these swinging seed-balls, an inch in diameter, like the balls of the buttonwood, except that those are smooth. (See illustrations,pages 102-103.) The best distinguishing mark of sweet gums in winter are the corky ridges on the branches, and the star-shaped leaves under the trees. Sweet gum sap is resinous and fragrant. Chip through the bark, and an aromatic gum soon accumulates in the wound. The farther South one goes, the more copious is the exudation. In Mexico a Spanish explorer described, in 1651, "large trees that exude a gum like liquid amber." This is the "copalm balm" gathered and shipped each year to Europe from New Orleans and from Mexican ports. The fragrant gum,storaxorstyrax, derived from forests of the oriental sweet gum in Asia Minor, is used as incense in temples of various oriental religions. It blends with frankincense and myrrh in the censers of Greek and Roman Catholic churches. It is used in medicines also, and as a dry gum is the standard glove perfume in France.
Beautiful and interesting in every stage of growth, our native sweet gums are planted largely in the parks of Europe and are earning recognition at home, through the efforts of tree-lovers who would make the most of native species in ornamental planting.
The name, gum tree, is applied to our tupelos, and to thegreat tribe of Australian eucalyptus trees, now largely planted in the Southwest.
The Osage Orange
Toxylon pomiferum, Raff.
Related to figs and mulberries, but solitary in the genustoxylon, is the osage orange, a handsome round-headed tree, native of eastern North America, whose fleshy roots and milky, bitter, rubbery sap reveal its family connections with the tropical rubber plants. (See illustration,page 119.) The fruits are great yellow-green globes, four to five inches in diameter, covered on the outside by crowded, one-seeded berries. This compound fruit reveals the tree's relationship to both figs and mulberries.
The aborigines, especially of the Osage tribe, in the middle Mississippi Valley, cherished these trees for their orange-yellow wood, which is hard, heavy, flexible, and strong—the best bow-wood to be found east of the Rocky Mountains. When the settlers came the sharp thorns with which the branches are effectually armed appealed strongly to the busy farmers and the tree was widely planted for hedges. Nurserymen produced them by thousands, from cuttings of root and branch. These trees made rapid growth and seemed most promising as a solution of the fencing problem, but they did not prove hardy in Iowa and neighboring states. Even now remnants of those old winter-killed hedges may be found on farm boundaries, individual trees having been able to survive.
The native osage orange timber is about all gone, for the rich bottom lands where it once grew most abundantly in Oklahoma and Texas have been converted into farm land.However, the growing of osage orange timber for posts is on the increase. Systematically maintained, plantations pay well. The wood is exceptionally durable in soil. Good prices are paid for posts in local markets. Twenty-five posts can be grown to the rod in rows of a plantation; they grow rapidly and send up new shoots from the roots.
The brilliant, leathery leaves and conspicuous green fruits make this native bow-wood a very striking lawn tree. It holds its foliage well into the autumn and turns at length into a mass of gold. It harbors few insects, has handsome bark, and is altogether a distinguished, foreign-looking tree.
Experiments of feeding osage orange leaves to silkworms have been successfully made at different times, but nowhere in America has silk culture succeeded. Since the white mulberry is hardy here and its foliage is the basis of the silk-growing industry in the Old World, it is futile to look for substitutes in the osage orange or any other tree.
PART IV
TREES WITH SHOWY FLOWERS AND FRUITS
The Magnolias—The Dogwoods—The Viburnums—The Mountain Ashes—The Rhododendron—The Mountain Laurel—The Madroña—The Sorrel Tree—The Silver Bell Trees—The Sweet Leaf—The Fringe Tree—The Laurel Family—The Witch Hazel—The Burning Bush—The Sumachs—The Smoke Tree—The Hollies
THE MAGNOLIAS
Four of the ten genera in the magnolia family are represented in North America. Of these, two are trees. All are known by their large, simple, alternate leaves, with margins entire; their showy, solitary, terminal flowers, perfect and with all parts distinct; and their cone-like fruits, compounded of many one- or two-seeded follicles, shingling over each other upon a central spike. The wood is soft and light throughout the family, and the roots are fleshy. The sap is watery and the bark is bitter and aromatic.
The genusmagnolia, named by Linnaeus in honor of Pierre Magnol, a French botanist, includes twenty species; twelve are native to eastern and southern Asia, two to Mexico, and six to eastern North America. They are ofpeculiar interest to horticulturists and to the general public, because they have the largest flowers of any trees in cultivation. A white blossom from six inches to a foot across is bound to attract attention and admiration when set off by a whorl of lustrous evergreen leaves. The petals of most magnolia blossoms are notably thick and waxy in texture and deliciously fragrant. Last but not least are the cone-like fruits, which flush from pale green to rose as they ripen against the dark, leathery foliage; at maturity their follicles open in a peculiar fashion and hang out their bright red seeds on slender elastic threads. Foliage, flowers, or cones alone would make magnolias superb as ornamental trees. All these qualities combined have given them a preëminent place in every country where ornamental planting is done. North America is fortunate in having so large a number of species that assume tree form.
When you see a magnolia in the North blossoming before the leaves, you may be sure it is an exotic species, and if the flowers are colored you may be equally sure that it is a hybrid between two oriental species, and belongs to the group of which the type isM. Soulangeana. The owner may be a magnolia enthusiast, able to show you on his premises both parents of this interesting and beautiful hybrid.
Seepage 87THE TATTERED, SILKY BARK OF THE BIRCHES
Seepage 87
THE TATTERED, SILKY BARK OF THE BIRCHES
Seepage 93BLOTCHED BARK OF THE SYCAMORE, AND THE SEED-BALLS THAT HANG ON ALL WINTER
Seepage 93
BLOTCHED BARK OF THE SYCAMORE, AND THE SEED-BALLS THAT HANG ON ALL WINTER
Seepage 97THE WARTY, RIDGED BARK, THE SWINGING SEED-BALLS, AND THE WINGED SEEDS OF THE SWEET GUM
Seepage 97
THE WARTY, RIDGED BARK, THE SWINGING SEED-BALLS, AND THE WINGED SEEDS OF THE SWEET GUM
Seepage 109TULIP TREE, FLOWER AND LEAVES
Seepage 109
TULIP TREE, FLOWER AND LEAVES
Yulan Magnolia
Magnolia Yulan
The Yulan magnolia, for centuries a favorite in Japanese gardens, covers itself before the leaves appear with pure white, fragrant flowers, bell-shaped and fully six inches across. In our Eastern gardens it is quite as much at home, and though young trees are oftenest seen, the older specimens are as large as any native magnolia. This is one parent. The other is but a shrub, the purple magnolia,M. obovata, that must be protected against the rigors of our Northern winters. It blooms in May or June, and its purple flowers, with rosy linings, are relatively small and almost scentless. The children of this parentage get their tints of pink and rose and crimson from this purple magnolia shrub.
Splendid, hardy, fragrant, big-flowered varieties have arisen from this cross. All are small trees, suitable for planting in city yards, where they are decorative throughout the season.
Starry Magnolia
M. stellata
The starry magnolia blooms in March or April, covering itself with star-shaped white flowers made of strap-like petals that form a flat whorl instead of a cup. This is the earliest magnolia and wonderfully precocious, blooming when scarcely two feet high.
The Southern states can grow the splendid Campbell's magnolia, which is in its glory in the high mountain valleys of the Himalayas, where it reaches one hundred feet in height. The fragrant flower-cups, from six to ten inches in diameter, shade from pink to crimson. It is rare in cultivation because it is not easy to grow, and northern horticulturists fail utterly to grow it outdoors; but the fact that it is the most beautiful of all exotic species must encourage its culture in the South, and difficulties will be overcome when the tree's peculiar needs are fully understood.
The Great Laurel Magnolia
M. foetida, Sarg.
The great laurel magnolia is oftenest seen in cultivation as a small tree of pyramidal or conical habit, with stiff, ascending branches, bearing a lustrous mass of leathery oval leaves, five to eight inches long, lined with dull green, or with rusty down, persistent until the second spring. When small these magnolia trees are as conventional as the rubber plants in hotel lobbies, whose foliage resembles theirs. But in the forests of Louisiana, where this tree reaches its greatest perfection, it earns the characterization that Sargent gave it, "the most splendid ornamental tree in the American forests." With a trunk four feet thick, and its head lifted from fifty to eighty feet above the ground and with each leaf cluster holding up a great white flower, waxy as a camellia, seven to eight inches across, the tree is indeed superb. William Bartram likened these flowers to great white roses, distinctly visible from a distance of a mile.
The purple heart of the flower, made by a spot of color at the base of each petal, and the overpowering odor, rather sickening as the flowers fade, lure insects to the nectar store at the bottom of the flower-cup. This odor, disagreeable to many people, is the one objection to this flower when brought indoors. A drawback that florists discover is that the slightest bruise of the waxy petals produces a brownish discoloration, which prevents the shipment of these flowers. The splendid foliage, however, travels perfectly, and a new and growing industry is the gathering of magnolia branches in Southern woods forChristmas decoration. These branches are offered in all Northern cities, and this demand threatens the extinction of the tree, which until comparatively recent years has enjoyed immunity because of the worthlessness of its soft wood.
The tree's natural range is from the North Carolina coast to Tampa Bay, and west along the Gulf Coast to Texas and southern Arkansas. As an ornamental tree, it is safely planted in Philadelphia, but its life is precarious farther north. It is widely grown in southern California as a street tree, notably in Pasadena and in parks and gardens for its blossoms, foliage, and fuzzy, horny cones.
The Swamp Bay
M. glauca, Linn.
The swamp bay has lustrous, bright green leaves with silvery linings. In Florida and across to Texas and Arkansas it grows into a superb evergreen tree, fifty to seventy-five feet in height. Northward along the Atlantic Coast its growth is stunted as the climate becomes more rigorous, until it reaches Massachusetts and Long Island, where it becomes a many-stemmed shrub, whose beautiful leaves fall in the autumn. On the streets of cities near the New Jersey swamps the flowers of the swamp bay are offered for sale in May. The buds are almost globular, and each one is surrounded by a cluster of new leaves. To spring back these waxy white petals, that are marred by a touch, is criminal; but it is the common practice with boys who hawk these flowers on the streets. Most of the charm is gone from flowers thus defiled by dingy fingers.
The finest flowers are borne on strong young shoots. The florists collect and handle them with extreme care. Much of the swamp land now useless along the Atlantic seaboard could be profitably planted to this magnolia, for the florist trade alone. The flowers bloom slowly through a period of several weeks. The enterprising owner of tracts planted to swamp bay could reap two harvests a year, almost from the first season: the flowers in spring and the leafy shoots for holiday decorations. In the South the leaves are evergreen.
The Large-leaved Cucumber Tree
M. macrophylla, Michx.
The large-leaved cucumber tree exceeds all other magnolias in the size of its leaves and flowers. In fact, no tree outside the tropics can match it, for its blades are almost a yard in length. The flowers are great white bowls, sometimes a foot across, made of six white waxy petals, much broader than the three protecting sepals outside. The inner petals have purple spots at the base. The fruits are almost globular, two to three inches long, turning red as they mature, equally showy when the scarlet seeds dangle from the open follicles.
These trees are at home in fertile valleys among the foothills of the Alleghanies, from North Carolina to middle Florida, and west to central Arkansas. Their range is not continuous. They occur in scattered groups that have come from seed.
The horticulturist has greatly aided nature in the spread of this tree in this country and in Europe, where its flowers and leaves attract universal attention. The mistakeusually made is to plant it in the middle of a lawn where the wind lashes the broad leaves into ribbons before they have reached their full size. Every twig or leaf that touches a petal mars it with a brown bruise. The only way to enjoy one of these remarkable trees is to plant it in the most sheltered situation, where the sunshine will reach it and the breezes will not. Then the silver-lined foliage and the superb white blossoms can come to perfection and the sight is worth going miles to see.
The Cucumber Tree
M. acuminata, Linn.
The cucumber tree is the hardiest of our native magnolias, tropical-looking by reason of its heart-shaped leaves, six to ten inches long. Its chosen habitat is rocky uplands, where the fleshy roots can find moist soil. It ranges from western New York to Illinois, Kentucky, and Arkansas, and follows the mountain foothills through Pennsylvania and Tennessee into Alabama and Mississippi.
The flowers are like tulips, and though large can scarcely be seen among the new leaves, because they are all yellowish green in color. The petals are leaf-like and the flowers have no fragrance to make up for their lack of beauty. Imperfect pollination results in distorted, fleshy cones that resemble cucumbers that have twisted and shrunken in spots as they grew. These fruits turn from pink to red as they mature, redeeming their ugly shape by their vivid color as the leaves turn yellow. In September, the scarlet seeds hang out and the wind whips them until they dangle several inches below the fruit. One by one they drop and new cucumber trees come up from this planting.
The wood of the cucumber tree is light, close-textured, weak, and pale brown in color. It has only local use in cabinet-making and for flooring. The tree is far more valuable in horticulture. It is a splendid stock on which to graft less hardy magnolias. It is a superb avenue and shade tree for Northern cities, and in this capacity it is as yet little known. It grows vigorously from seed, and stands transplanting, if care is used that the brittle roots are not mutilated nor dried.
The Umbrella Tree
M. tripetala, Linn.
The umbrella tree has an umbrella-like whorl of leaves surrounding the flower whose white cup stands above three recurving white sepals. The whole tree suggests an umbrella, so closely thatched is its dome of thin, bright green leaves.
The stout contorted branches and twigs lack symmetry, from the forking habit. Side twigs strike out at right angles from an erect branch, then turn up into a position parallel with the parent branch, and bear terminal flowers, which induce another branching system the following year. Despite its angularity this is the trimmest and one of the handsomest of our native magnolias, and it has the merit of hardiness even in New England, where it attains large size. Its native range extends from Pennsylvania near the coast, along the Atlantic seaboard, and westward to southern Alabama and Arkansas. It loves swamp borders and the banks of mountain streams, but behaves well in the moderately rich soil of parks and gardens.
The Tulip Tree
Liriodendron tulipifera, Linn.
The tulip tree is a cousin, rather than a sister, to the foregoing magnolias. It stands alone in its genus in America, but has a sister species that grows in the Chinese interior. A tall, stately forest tree, it reached two hundred feet in height, and a trunk diameter of ten feet, in the lower Ohio Valley, when it was covered with virgin forest. This species still holds its own as a valuable lumber tree on mountain slopes of North Carolina and Tennessee. Smaller, but still stately and beautiful, it is found in woods from Vermont to Florida and west to Illinois, Arkansas, and Mississippi.
In Europe the tulip tree has been a favorite since its discovery and exportation by the American colonists. More and more it is coming to be appreciated at home as a lawn and shade tree, for there is no time in the year when it is not full of interest and beauty, and no time in its life when it is not a distinct and beautiful addition to any plantation.
In the dead of winter young tulip trees are singularly straight and symmetrical compared with saplings of other trees. There is usually a grove of them, planted by some older tree that towers overhead, and still holds up its shiny cones, that take months to give up their winged seeds. The close, thick, intricately furrowed bark of the parent tree contrasts sharply with the smooth rind of its branches and the stems of the saplings. Tulip trees are trim as beeches until the trunks are old.
The winter twigs are set with oblong blunt leaf-buds. The terminal one contains the flower, when the tree is oldenough to bloom. (See illustration,page 103.) In spring the terminal buds of saplings best show the peculiarity of the tree's vernation. Two green leaves with palms together form a flat bag that encloses the new shoot. Hold this bag up to the light and you see, as a shadow within, a curved petiole and leaf. The bag opens along its edge seam, the leaf-stem straightens, lifting the blade which is folded on the midrib. At the base of the petiole stands a smaller flat green bag. As the leaf grows to maturity the basal palms of its protecting bag shrivel and fall away, leaving the ring scar around the leaf base.
Now the growing shoot has carried up the second bag, which opens and another leaf expands, sheds its leafy stipules, and a third follows. The studies of this unique vernation delight children and grown-ups. It is absolutely unmatched in the world of trees.
The leathery blades of the tulip tree are from four to six inches broad and long, with basal lobes, like those of a maple leaf, and the end chopped off square. Occasionally there is a notch, made by the two end lobes projecting a trifle beyond the midrib. The leaves are singularly free from damage, keeping their dark lustrous beauty through the summer, and turning to clear yellow before they fall.
The winged seeds fall first from the top of the erect cones, the wind whirling them far, because the flat blades are long and the seed-cases light—many of them empty in fact. Far into winter a tulip tree seems to be blossoming, because its bare branches are tipped with the remnants of the seed cones, faded and shining almost white against the dark branches.
Tulip wood is soft and weak, pale brown, and light in weight. It is easily worked and is used locally for houseand boat-building. Wood pulp consumes much of the yearly harvest. It is known as "poplar," whose wood it resembles. Ordinary postal cards are made of it. The bark yields a drug used as a heart stimulant.
THE DOGWOODS
Foliage of exceptional beauty is the distinguishing trait of the trees in the cornel family, from the standpoint of the landscape gardener and the lover of the woods. Showy flowers and fruit belong to some of the species; extremely hard, close-textured wood belongs to all; and this means slow growth, which is a limitation in the eyes of the planter who wishes quick results. But he who plants a cornel tree and watches it season after season, finds it one of the most interesting of nature studies through the whole round of the year.
The dogwoods are slender-twigged trees of small size, with simple, entire leaves, strongly ribbed, and with one exception, set opposite upon the twigs. Fifty species are distributed over the Northern Hemisphere; one crosses the equator into Peru. Four of the seventeen species found in the United States are trees; the rest are shrubs, one of them the low-growing bunchberry of our Northern woods.
The Flowering Dogwood
Cornus florida, Linn.
The flowering dogwood (see illustration,page 134) is a little tree whose round, bushy, flat-topped head is made of short, horizontal branches. The twigs hold erect in the wintera multitude of buds, large, squat, enclosed in four scales, like the husk of a hickory nut. All the delicate tints that the water-colorist delights in are found in these buds and the twigs that bear them. When spring comes, these scales loosen, expand, turn green, then fade into pure white—forming the four banners, ordinarily called petals—of the bloom of the dogwood. The true flowers are small and clustered in the centre. These white expanses are merely modified bud scales, the botanist will tell you, and the notch at the end is where the horny winter scale broke away, while its base was growing into the large white palm.
From March till May one finds the dogwood clothed in white (see illustration,page 118), and the glossy leaves passing through changing hues from rose to green. The wayward arrangement of the blossoms on the branch is the delight of artists. Lured by the white signals, bees and other nectar-loving insects come to the flowers, cross-fertilizing them while they supply their own needs. In midsummer the pale green clusters of berries replace the flowers, and when in autumn the foliage, still glossy and smooth, changes to crimson and scarlet, the berries are brighter still, until the birds have taken every one.
The bark of the dogwood is checkered like alligator skin but with deep furrows that make it very rough. The wood is used for wood engraving blocks, for tool handles, hubs, and cogs. But it is becoming very scarce. The deplorable destruction of the dogwoods comes not so much from the lumberman as from the irresponsible people who tear the trees to pieces in blossoming time. The wanton mutilation of the dogwoods in natural woodlands belonging to cities can be curbed only by policing the tracts. Thesaving of every flowering dogwood tree is a duty owed to his community by every wood-lot owner within the range of this hardy, handsome tree. Though exterminated over much of its range, it is able and willing to grow in any state east of the Mississippi River. It is one of the most deservedly popular trees planted for ornament in this country and in Europe.