All winter the grey beech trunks look almost white among the dark trunks of neighbouring trees. Their branches are dark at the tips, and the buds are long, slim, and sharp-pointed. Silky, brown bud scales, in many layers, protect the young shoots hidden in these buds. In April these shoots impatiently push aside their wrappings. The outer scales fall, the inner ones grow longer, but the growing tip leaves them behind, and they fall, while the silky-coated, fan-plaited baby leaves hang limp and helpless on the lengthening stem.
No tree of the woods is more beautiful than the beech as its twigs cover themselves with the tender green of spring. Beech leaves arehandsomewhen full grown. In the short hours of their babyhood they arelovely.
The sturdy shagbark hickory is late in waking. Poplars and beeches are in full leaf when the big buds of this familiar tree with the shaggy bark begin to swell, and show the pale, silky inner scales under the black outer pairs, which soon fall off.
The branches are stiff and angular, but the twigs hold up their big buds, and the trees look like great candelabra, each holding up a thousand lighted candles. As the pointed buds push upward, the protecting scales grow rapidly larger, and the outer ones turn back like the sepals of an iris. Wonderful tints of olive and yellow, violet and rose, blend in their silky covering. Out of this petal-like frill rises the cluster of young leaves, small but perfectly formed, and just as varied and delicate in colouring under their velvet covering. These complete the flower-like appearance of the young shoots. The illusion lasts only until the leaves spread out, and take on their natural, colour and size. The scales fall, their duty done, and the flower catkins come out, under the broad umbrellas of the fresh, new leaves. The tree is thoroughly awake, and has begun its long summer’s work.
The great winter buds of the shagbark hickory open like flowers in MayThe great winter buds of the shagbark hickory open like flowers in May
The great winter buds of the shagbark hickory open like flowers in May
Pink and silvery catkins of trembling aspen, and the white, flannel-like leaves, just openedPink and silvery catkins of trembling aspen, and the white, flannel-like leaves, just opened
Pink and silvery catkins of trembling aspen, and the white, flannel-like leaves, just opened
The poplar likes to grow in moist ground, and in companies of its own kind. Copses of these trees, especially if they be young ones, are sure heralds of the coming spring. Their stems and branches are smooth, and almost as pale as white birches. They become greenish, especially the smaller branches and twigs, as the sap rises. They are alive from root tips to shining buds.
The brown scales loosen in March on theplumpest buds. The fuzzy grey pussies push out, and lengthen into soft chenille fringes that wave gracefully from every twig. They are grey, with a flush of pink, an exquisite colour harmony, too lovely to last. Their catkins fall as soon as their golden pollen dust is ripened and scattered by the wind. The plain, green fertile ones on other trees catch the pollen, and set seed which ripens, in green, berry-like capsules, in May. The seeds are almost too small to be seen. Each floats away with the small wisp of down in which it hides.
The slim buds on the same twigs open while the trees are still in blossom. The young shoots come out, and unroll their baby leaves, soft and white, covered with a silky down, and tinted pink under the protective hairs. For a short time only they look like white velvet, and are limp and helpless. Then the hairy coat is shed; the leaves become shiny and bright green, and twinkle in the sunshine. The stems are flexible and long and flattened. This makes them catch the breeze, if the blades do not, so the foliage trembles whenever a breeze goes through the tree top.
Quaking aspen, trembling aspen, and “quakenasp” are popular names given this tree, whose foliage has the appearance and the sound of rippling water. Tradition says the tree is foreveraccursed, and trembles as from fear, because the traitor, Judas, hanged himself on an aspen. This is a foolish notion. Only gaiety is expressed by the continual fluttering of the aspen’s leaves.
The buds of cottonwood and Balm of Gilead trees are sealed with a fragrant wax which softens as spring loosens the scales and growth begins.
Bees throng these trees, and gather the soft wax to carry to their hives. They use it to stop up cracks that would let in the rain. What is not needed at once they store for future use. Bee-keepers call it “propolis.” They have offered the bees something “just as good,” but they will take no substitute for the genuine. That is produced only on the buds of trees of the poplar family, and for a brief season it is ready for them in spring.
In late March, or early in April, before the leaves have come out on any of the trees along your street, you may look out of an upper window and notice that strange-looking tassels are hanging on the twigs of a poplar or cottonwood tree. Its buds are large and they shine in the sun, as if they were wet. A day or two later youmay be walking with your mother or sister, and she will be startled to see the sidewalk covered with what look to her like great red caterpillars! Then you may remember the tree with the tassels on it, and recognise them, and explain where they came from.
A single look shows that this worm-like object is a catkin, and the lovely red is the colour of the many stamens that contain the pollen dust. When this is ripe the stamens burst and let it fly away. Then the tree lets its catkins fall, for they have done their part.
Green catkins hang on other trees of the same kind in the neighbourhood. The flowers are waiting for pollen that will enable them to set seed. If the wind blows in the right direction when the pollen is flying about, the green, fertile flowers will get all they need. These catkins are not shed as the red ones are. They make little show among the opening leaves, but little seed balls take the place of the flowers. By the end of May the green balls the size of peas turn yellow, and open. Out of each pod floats tufts of white down, each bearing away a tiny white seed. This is the end of the story. Before the chestnut trees have begun to blossom, the poplars have scattered their seeds, and have all the summer to spend in growing long, supple shootscovered with their dancing, shining leaves. They look as if they enjoy life!
The pussy willows push their fuzzy noses out in winter. Some are even showing in autumn. But the yellow pollen is not seen on these flowers until the catkins are full grown, and they wait till winter is past. They dare not risk a frost.
Among pussy willow trees there is a difference in the catkins. On one tree they turn yellow when mature; the golden pollen dust rises in a cloud when the twig is disturbed. These catkins soon fall off.
On other trees the catkins are greenish, and they stay on after reaching full size. They are the fertile flowers, which develop into seed pods. Pollen brought to them by the wind or by visiting insects in search of nectar, insures the setting of seed in these flowers. Though the gayer flowers fall, they are quite as necessary to the making of seeds as the fertile ones. In all the willows and poplars, it requires two trees, bearing the two kind of flowers, to make the seed. And the wind and nectar-seeking insects are necessary as pollen-carriers.
The winter flower buds, the blossoms, the full-grown winged seeds, and the ribbed leaf of our American elmThe winter flower buds, the blossoms, the full-grown winged seeds, and the ribbed leaf of our American elm
The winter flower buds, the blossoms, the full-grown winged seeds, and the ribbed leaf of our American elm
The majestic, fan-shaped elm blossoms while snow is still on the fieldsThe majestic, fan-shaped elm blossoms while snow is still on the fields
The majestic, fan-shaped elm blossoms while snow is still on the fields
In marshy land, or by a brook or river, or even just outside the window at home, there is a tree that turns rosy in March with a multitude of small red flowers clustered on the sides ofits twigs. It is the swamp maple, the red maple, the river maple, the scarlet maple. Two of these names tell of the tree’s thirst; two name its colour when in blossom, and also when the leaves change colour in autumn.
Each flower is a red bell, for the petals are red. One has a red forked pistil thrust out; another lacks a pistil, but has a cluster of yellow stamens. One tree may be deep red throughout, having only pistillate flowers. Another may have only staminate flowers; it will be orange coloured, by the blending of the colours of the yellow stamens, and the red petals. Another tree may have flowers of both kinds. Occasionally flowers will be found that have both stamens and pistils.
The bees are in the scarlet maples at the first loosening of the bud scales. There is nectar in those flower bells. The colour and a faint fragrance tell this secret. From pollen flowers the busy insects carry the golden dust to the forked pistils that set seeds.
The wind helps by scattering pollen in the tree tops, and very soon the flowers are gone. The staminate trees turn green when the opening leaves lose their vivid red. The pistillate trees hang out red clusters of winged seeds below the opening leaf clusters. These red trees keeptheir name written plainly as long as the seed clusters swing.
Early in March, the side buds on the elm twigs begin to swell, and soon clusters of purplish flowers, small but very pretty, come out of the largest buds, and the tree top has a purplish haze upon it, that means that spring is coming. The bees come to get nectar from these early blossoms, but few people speak of the blossoming elms. They do not notice that elms ever blossom; and are rather incredulous when a spray is shown them covered with the graceful little tassels. “Who everheardof elms having flowers?”
The truth is that every tree, when it is large enough, bears flowers. Not every one bears fruit, for some have pollen flowers only, the seeds being borne on the fertile trees. Elms have perfect flowers, and soon after the leaves open, the green fruits are seen in clusters, and before May passes, the seeds, each surrounded by an oval wing, flutter off in the wind.
Beautiful and stately, yet full of grace is the form of a big elm tree against the grey sky of a cloudy winter day. The tall trunk iscrowned with many main branches, which spread into a widening funnel shape, subdividing into numberless smaller branches, whose direction is outward and downward. The numerous twigs have the droop of a weeping willow. The tree top is wonderful when every limb is bare.
In summer the same tree is a great fountain of green leaves. The long, leafy twigs of new wood are flung out to the wind, and the twinkling blades dazzle the eyes like spray. This is the time that we love the elm for its shade, and as an ornament to home grounds and parks. Roadside elms are the favourite nesting trees of the Baltimore oriole, whose hanging pocket of grasses and yarns swings at the end of a high outer branch.
When winter is still in the air, and snow on the landscape, the dark twigs of these bare elm trees change colour. It is the purple flower clusters that are flung out from opening buds in late March. It takes sharp eyes to see the cause of the wine-coloured flush in the tree top. With the opening of the leafy shoots in April, the trees get an added colour from the pale green seed discs that replace the flowers. These are winged, and they soon turn brown, and fly away on the first breeze. This is the elm’s way of sowing seeds. A crop of young elms grows eachsummer in fields and gardens near these seed trees. The leaf of the seedling is exactly after the pattern of the parental tree, but smaller.
The English elm is less graceful than our American tree. It has more the stature of the white oak. The head is compact, and the foliage mass thicker, and longer-lived. The robin red-breast nests close to the sturdy trunk, shielded by the earliest leaves.
An old couplet guides the farmer in the old country:
“When the elm leaf is as big as a mouse’s ear,Then to sow barley never fear.”
“When the elm leaf is as big as a mouse’s ear,
Then to sow barley never fear.”
The toughness of elm is remembered by all who have “read of the wonderful one-hoss shay.” Nothing but “ellum” was proper stuff for the hubs, you know. As it is durable in soil, elm is good timber for posts and railroad ties. By its toughness and flexibility, it is fit for waggon tongues, and all kinds of agricultural implements. The ancient warrior of England was likely to carry a longbow made of the tough British elm.
Slippery elms grow more irregular in form than the American, and are usually smaller trees. Both kinds grow together in the wooded regions east of the Rocky Mountains. The difference between them can be easily detected by a blindperson. Twigs, buds, and leaves of slippery elms are made rough and harsh to the touch by coarse, reddish hairs.
Boys and many other people like the taste of the glutinous inner bark of this tree when the sap is running, and the limbs and trunks peel easily. Many a tree is sacrificed to this appetite. The same delectable mucilaginous substance quenches the thirst and allays hunger,—so hunters say, who have eaten it when lost in the woods, and threatened with starvation. Poultices of it relieve throat troubles, when there is congestion. It is a home remedy for inflammations and fevers. Dried and ground, the rich cambium is mixed with milk, and forms a nutritious and tasty food for invalids. It is a staple on the shelves of apothecary shops.
The rock elm might be mistaken for a bur oak were the leaves not decided proof that it is an elm. The limbs are shaggy, and the twigs winged by the corky bark. Indeed, another name for the tree is the cork elm. The framework of this tree is stiff and irregular, a decided contrast to the graceful drooping top of the American elm, whose symmetry is one of its best points.
The wood has its fibres so interlaced that no wood excels it in toughness and springiness. It is the wheelwright’s choice. It makes thefinest bridge timbers, and the best axe handles, and wheel hubs.
The winged elm is the smallest and daintiest of the elms. The twigs are broadened by a corky ridge on each side. This gives the tree its name. The Indian name, Wahoo, is also heard in the South. The leaves are of the elm type, but unusually small.
It is seen as a street and lawn tree in cities and towns south of Virginia, and west to Illinois and Texas.
If you meet a tree of good size, with slender branches, and small buds set opposite upon the twigs, you may suspect it of being a maple. The leaves are needed to assure you. If it is winter time, and the tree stands on the street, the leaves may all have been raked away. If the tree grows in the woods, the chances are that there is a leaf carpet over its roots, and that most of these leaves have fallen from its branches. You can make sure of this point by picking up a dead leaf, examining the base of its stalk to see if it fits the leaf scars on the twigs. If the leaves are simple, that is, if they have a single blade, the evidence that this is a maple is very strong.There are a few small trees with simple leaves set opposite on the twigs, but they do not grow as large as maples.
Does the leaf have three main divisions, each with a vein which is one of three large branches of the leaf stalk? Then you may be sure that the tree is one of the maple family.
Simple leaves, of three main lobes, set opposite on the twigs, and the twigs set opposite on the branches,—in these are the plain signature of the maples. They write their names in these characters, across every branch throughout the growing season, and on the leafless branches, and the dead leaves under the tree in winter. Another signature is the one-sided maple key, which hangs on the trees all summer, and even late into the winter on some kinds, but is shed in early summer by a few.
The two early-blooming maples are commonly planted as street and shade trees all over the Eastern half of the country. It is easy to recognise these, and to know them apart by the leaf alone.
The red maple is a spreading, symmetrical tree, of medium size with slender, erect branches. The leaves are red when they open in spring; so are the flowers which cluster on the bare twigs in early April, before the leaves are out. Theclustered fruits that dangle in pairs all along the stems in May are red, and in the autumn the tree changes its green robe of foliage to scarlet before winter comes. The buds that cluster at the joints are red as rubies, and the slim twigs glow with the same warm colour, which is warmer by contrast with the snow.
All maple leaves are more or less cleft into three main divisions. The red maple has two shallow clefts, V-shaped, at the top, and the lobes are pointed and triangular. The margins are irregularly saw-toothed. These leaves are often downy beneath, and always white-lined when young. In summer they have pale green linings. As a rule, red maple leaves are small, averaging less than three inches in the length of their blades. They are larger on young trees.
The silver maple is much more easily grown from seed than the red maple, but it has a far more irregular tree top. The limbs branch low on the trunk, and these limbs grow very long, giving the tree a loose head of great height, and great horizontal spread. The small branches curve downward, and the twigs are held erect. The wind twists and breaks these great weak limbs, or wrenches them loose from the trunk. It is dangerous to have these trees near the house, for wind and ice storms are constantly snapping offbranches large enough to break windows, or knock down chimneys as they fall.
The flowers of the red maple are concealed in winter in brown budsThe flowers of the red maple are concealed in winter in brown buds
The flowers of the red maple are concealed in winter in brown buds
Seeds of red maple, in late May, and in early AprilSeeds of red maple, in late May, and in early April
Seeds of red maple, in late May, and in early April
The flowers of the silver maple show no red. They come out greenish-yellow on the twigs when the red maple’s flowers are glowing on their red twigs in March, and early April. The leaves are pale green, white beneath, and set on long flexible stems. They are larger than the leaves of the red maple, and cleft in a distinctly different way. A narrow, deep fissure divides the leaf in thirds, and two side clefts divide the lower lobes in two unequal halves. These fissures reach two-thirds of the way through the leaf blade, and each lobe is cleft along its sides, into many irregular bays and capes. These leaves are always silvery white beneath in summer, and they turn to yellow in the autumn.
In late May the pairs of winged keys hang on short stems. Each key is about two inches long, fuzzy green, until ripe, twice the length of the smooth keys of the red maple, which are ripening at the same time.
It is good fun to lie under a maple tree, and watch the seeds as they fall. If the wind is strong, they shower down like rain. Each key separates from its mate, and as it lets go its hold on the twig, the wind catches its thin wing, and sends it whirling round and round. Theheavy seed makes for the earth, while the flat blade above it acts as a parachute, or a sail, to keep it in the air.
How far does a silver maple send its seeds in these summer days, when they are falling? It is easy to answer this question by pacing the distance from the tree trunk in a straight line to the point where the farthest key falls. Go in the direction towards which the wind is blowing, in determining this distance. It will be interesting to run out another line from the tree trunk to find out how far the seeds are thrown on the side that is against the wind.
From the silver maple go to a red maple, and watch the harvest of these small-winged keys. Do a little measuring here, and find out if their smaller size and weight enables these seeds to sail further in the same breeze than those of the silver maple.
The sugar maple is known also as the rock or hard maple, because its wood is harder, and therefore slower to grow, than the two quick-growing soft maples just described. This is the one whose trunk is tapped in spring, and the sap boiled down in great kettles over an open fire in the woods. When the water is all evaporated, solid cakes of maple sugar remain. If you are walking in the woods in winter, and come uponany trees bored with small auger holes, several near the base of each trunk, you may suspect that this is a grove of hard maples which the New England farmer calls his “sugar bush.”
Look at the twigs, and you will see that the plump round buds are set opposite, and the twigs are opposite on the branch. This is the way with all maple trees. Are the branches many, and do they shoot upward rather than outward, and form an oval head? This is the typical habit of young hard maple trees. As they grow older the heavy lower limbs become horizontal. They are clean, hardy, vigorous trees, long-lived, dependable, able to meet the storms, and to suffer the theft of their rich sap every spring without apparent loss of strength and vitality.
The leaves come out later than those of the soft maples. They are firm, and broad, with five pointed lobes between wide fissures that reach half-way to the stem. Margins of these lobes are wavy, never saw-toothed, like those of the silver maple. They are dark green above, with paler linings. In autumn they turn to yellow, orange, and red.
The flowers open in May, shortly after the leaves appear. They are in thick, hairy, yellowish clusters. Some are pistillate, some staminate, in the same cluster. Those with the forkedpistils remain and grow into smooth fruits towards the end of summer. The keys of sugar maples are short-winged, like those of the red maple, but have stouter, thicker seeds. They are shed in late autumn and early winter.
Hard maples are among the best of shade trees, and the glory of their autumn colouring makes them one of the most to be desired among trees planted merely for ornament. A street planted to hard maples is well planted always. But people are impatient for trees to grow up. The slow growth of the sugar maple is discouraging. It is a good plan to plant the quick-growing soft maples, and alternate with them the slow-growing species. For a few years the soft maples are pretty, and with each year’s growth they give more abundant shade. By the time the wind has crippled their long arms, and made the trees unsightly, the hard maples are coming on to take their places, and they need the room which is given them by the removal of their neighbours on to the left and right.
When I went into the woods of Oregon, I found the vine maple trees, which seems not to have sufficient backbone to stand upright. These trees start to grow erect, but their weight soon overcomes their strength, and they droop, but keep on growing, with their limbs prostrate on theground. The wet land in many places was covered with a network of the interfering branches of these serpentine maple trees.
The leaf is about the size of the palm of my hand, and almost circular. The border is cut into many shallow lobes. The seeds are characteristic keys, smooth, and the wings of each pair are spread almost opposite each other.
The Norway maple is a most popular street tree. Its foliage is very dense, and the tree forms a round, symmetrical head. The broad, five-lobed leaves are remotely toothed, smooth, thin, and dark green on both sides. Break a leaf stem, and a milky juice appears. The seeds are very flat, and have broad, flaring wings. The flowers are yellowish. Great clusters of them come out with the leaves. The seeds are ripe in autumn.
We shall find that the foliage of the Norway maple stands the wear and tear better than that of many shade trees. The crown of a Norway maple turns to bright gold in autumn, and most of the leaves are still unmarred when they fall.
The box elder is the one native maple which has compound leaves. The leaf blade is cleft quite to the stem, and the thirds form separate leaflets, each mounted on its own stalk. Theseleaves are set opposite on the twigs, like those of other maples.
In spring pink fringes like corn silk decorate the branches of certain box elder trees. Other trees of the same kind hide little green flowers among the opening leaves. The pink fringes are the pollen-bearing flowers, which fall when ripe. Staminate trees never bear fruit. All through the summer the trees which bore the greenish flower are dangling clusters of pale green seeds, each with the peculiar wing, which proves it a maple. When the ragged, yellowing foliage falls, these seed clusters remain on the branches, and all through the winter the wind is plucking and carrying them away.
The wood of box elder is very soft. The tree is planted because it grows so quickly and surely, and its seeds are so easily obtained. But broken branches give the older trees a crippled, unhappy look, and the ragged clusters of seeds give them a disheveled appearance all winter. Fortunate is the man who has planted elms or hard maples along the road, so that he may take out the decrepit box elders, and have the better trees coming on to take their places.
The striped maple is a little tree, which hides in the woods, and only a few people know the tree, and love it as it deserves. The stripes areon its smooth green bark, which breaks into a network of furrows as the stems increase in diameter. These furrows expose a very pale under-bark, so that at a short distance the trunk seems to be delicately traced with white lines.
In its blossoming season the striped maple has a loose, drooping cluster of yellow, bell-like flowers. The leaves that surround them are broad and shallowly three-lobed, and saw-toothed all around. The seeds are little maple keys, smaller than those of the red maple.
The mountain maple is another little tree quite as modest and retiring as its striped cousin. It has longer, more taper-pointed leaves. The flower clusters are much smaller than those of the striped maple, and they stand erect. The fruits hang late in the winter, on the grey downy twigs, which are brightened by red buds.
One of the first tree families whose name we learn is the willow family. The members are numerous, and the botanists find great difficulty in distinguishing certain species, which closely resemble each other; but these troubles we shall leave to the scientist. The point forus to consider is this: When we see a tree which we know to be a willow,howdo we know it? “It looks like a willow,” some one says. But who knows, and can tellhowwillows look—how they differ from other trees?
First, willows have slender, flexible twigs that give the tree tops grace and lightness. Second, willow leaves are nearly always long and slim to match the supple twigs. They are always simple, and short-stemmed. The wood is light and soft, so the trees break easily in storms of wind and ice. An old willow tree is likely to be crippled, but its scars and wounds are covered in summer by the arching branches and the abundant foliage.
The first trees to blossom in spring are the shrubby pussy willows, a distinct kind whose catkins are so eager to push out of their scales that their grey, silky noses are often seen in November. Frequently, they are out and the scales dropped in February; but the yellow stamens and the long-tongued pistils do not rise above the grey fur until March, at least. The most attractive stage of these catkins is the earlier one, when the flower buds are concealed by the grey silk.
By cutting pussy willow twigs in the late fall, or any time during the winter, and putting theminto a jar of water, we may see the blossoming, quite out of season. Sufficient food is stored in the twig to force out the blossoms, even to the shedding of the pollen. It is a charming thing in the winter to have a vase of these twigs in full bloom on a window sill when snow banks are piled high just outside.
Willows are lovers of wet ground, and we shall see groves of them scattered along streams and on the margins of ponds and swamps. A few species thrive in dry soil, and seem to prefer it. Some grow at sea level, others are found on high mountains. From small shrubs they vary to mighty trees. There is no climate and no soil that does not have its native willows. The family is distributed from the Equator to the Arctic Circle.
It is very common in many places for farmers to plant a grove of willows for a windbreak, to protect their houses and barns. This is especially seen in prairie states and other treeless regions. Willows are quick-growing trees, and sure to grow. All one needs do is to cut limbs from a growing tree, chop these limbs into pieces the length of stove wood, and drive them into the ground. Each one takes root, and grows into a tree, if the soil is at all moist.
Another plan is to cut fence posts from thewillow grove, and drive them into the ground. Each of these posts forms the trunk of a willow tree, which soon has a great head of branches.
In Holland and other countries, willows are thickly planted to form hedges and for their roots to hold the soil along the banks of streams and ditches. The same trees may perform a double service. Willow wood makes good summer fuel, where a quick, hot fire is desired. The twigs make the best charcoal used in the manufacture of gunpowder. The long, flexible twigs of a low-growing willow are used in the manufacture of wicker chairs, tables, and other furniture. These trees are grown on a large scale in France and other European countries, and the industry is being introduced in some parts of America.
When spring comes on, we may notice a peculiar change in the colour of the bare willows that line the stream borders. The twigs turn gradually green, and the long, pointed buds prepare to cast off their single scales. These are shaped like the long, knitted caps which children wear in winter time, although there is no tassel at the end. The cap fits snugly over the long bud, and is fastened in a circle at the joint. The swelling bud simply pushes it off.
Under these trees, we shall find a good manyfresh twigs. Reaching up to break one, we find that it snaps off short at the base. It is not brittle along its whole length. Try a dozen twigs, and off they snap, almost at a touch. The wind has broken off those that fell to the ground. Some that fall in the water, float away down stream. They catch on sandbars, and strike root. Some swing in to the shore, and grow on the banks.
We have discovered a habit of certain kinds of willow trees. The shedding of their twigs at the season when they are fullest of life is the tree’s method of colonising new territory. These twigs float away, and blow away, and those which lodge in wet ground before they dry are almost sure to grow. The billowy acres of green which cover sandbars and stream borders are willow trees, children of parents that grow far up stream.
Along roadsides in this country a large willow is much planted, whose leaves are pale beneath, so that they look very cheerful and cool in midsummer. The most striking thing about these willows is that their twigs are yellow as ducks’ feet, and particularly bright in early spring. The older trees grow very stout, and great branches leave the trunk close to the ground. This is the golden osier willow, one form of the white willowof Europe, which does not grow vigorously in this country.
The weeping willows, whose long, supple branches sweep out and downward, sometimes yards in length, from the tree top, came originally from Babylon. Who were they in that far country who “hung their harps on the willow trees”? A great many weeping willows in the Eastern states are said to be sprung from the parent tree, which grew on the Island of St. Helena. What famous prisoner probably sat under the shadows of this willow tree, and dreamed again of conquering the world? The weeping willow has the habit of snapping its twigs off, short, at the base. One of these long withes, cut into bits with one or two buds on each cutting, will start as many weeping willow trees, if the bits are stuck into wet sand and kept wet until rooted, and then set out and given plenty of water until they become established in the ground.
The black willow is named for the black bark of the old tree. It is the only one of the narrow-leaved willows whose leaves are uniformly green on both sides. These leaves are often curved like a sickle. At the base of each leaf is a pair of heart-shaped, leafy blades, called stipules. Many trees have stipules that come out with theleaves, and are dropped off, but these persist, as a rule, all summer. The black willow is one of those with the twigs that snap. It takes possession of stream borders, and its offspring may cover miles of new territory in a single season.
The balsam willow we shall know by the fragrant coating of wax, or balsam, on its young shoots and buds. Its broad leaves are blunt at the tip, and look scarcely willow-like, but the tree is known by its buds and its catkins. To find it we shall have to go into the boggy regions in the Northern tier of states, where it is numerous, but never more than a shrubby tree.
One use is served by no tree as well as a willow. When the sap rises in spring, the willow branches are in prime condition to make whistles. I wonder if there is a boy, in town or country, who does not know how to make a willow whistle that will “go”? Surely not, unless his supply of uncles and grandfathers is short. You cannot make a willow whistle by following printed directions. Some skilful person, who has been a boy, must show you, and one lesson is enough.
Spring or early summer is the best time to study the leaves of trees. They are clean, andfresh, and new. Every tree is a great mound of green. The broad-leaved trees seem to be thatched or shingled with overlapping blades so that no sunlight can get into the darkened room, which is empty except for the bare branches that support this outer dome of leaves. A sugar maple, or a linden tree, shows best this outer thatch, which is so thick that the sun is unable to look through. The bird flying overhead sees only a solid mass of leaves. The one on its nest in a forked limb looks up and sees the inside of this leafy tree cover. She is glad for the twilight that surrounds her, and for the coolness of this shady place; but more glad that her nest is hidden from sight of hawks that sail overhead, while she keeps a close watch for sly, thieving red squirrels that may come to steal her eggs, by climbing up the branches.
What are the leaves for? Why does the tree put out in spring young shoots with rows of leaves along their sides? Why does the tree hold these branches out as far as possible from the trunk, and bend the leaf stems and the twigs so as to face the leaf blades towards the sun?
The reason is this: the life of the trees is in the green layer which we see on the surface of all green shoots, and which we can discover under the older bark of twigs, which has turnedbrown. Following the twig back from its tip, all of the leafy part is green. Behind it the smooth twig is no longer green, but a thumb nail easily strips off the layer of brown, and reveals the green under bark. Go a little further back, and gradually the outer bark thickens, and it is more difficult to get at the soft under layer. After a while, we shall need a knife to reach it, for old bark is hard and tough.
When the bark gets so thick that the sun cannot reach the green layer, the colour fades out. The living part of the trunk of the tree is the soft, juicy layer between the bark and wood. Through this portion of the tree the sap rises from the roots, and finally reaches the leaves. This sap needs to be changed before it can be useful to the tree as food.
The leaves are the places where these changes take place. Through little doorways in the under sides of the leaf air passes in. With it goes carbonic acid gas, an important food element. The soft green leaf pulp, which is the green juice of a bruised leaf, has a wonderful work to do. It cannot do this work unless the sun is shining upon it. On a bright day every leaf is making starch, and sending it down through the twigs and branches as food. This starch is contained in the sugary sap that flows back constantly fromthe leaves to the farthest root tips. It is made in the leaves out of the sap brought up from the roots and the carbonic acid gas which the leaves absorb from the air.
As long as the leaves do their work, the tree is able to grow, and to blossom, and to ripen its seeds. When the leaves have done their work the summer has passed; the tree lets go the leaves, and rests without growing all winter.
It is not easy to explain the work of the leaves, nor even to understand the wonderful work accomplished there all through the summer. When we eat, our food must go into the stomach to be changed by the processes called digestion. It is hours before the digested food is poured into the blood and carried to all parts of the body. The tree takes its food from the air, and from the soil. Neither the dirty water that rises as sap to the leaves, nor the gas which enters the leaf doorways from the air, is useful as food to the growing tree until they have been combined and changed. The leaves are, then, in a sense, the stomachs of the trees, for in them the raw foods must be “digested” before they are ready to be poured into the life blood that flows down through all the live parts of the tree. Now they are fit to feed the growing cells, which are always hungry.
The leaf of the tree is its visiting card. We shall learn to know trees by their leaves, as easily as if the name were written across the face of the leaf. Some leaves have a single blade of green, and for this reason the botanist calls themsimpleleaves. This blade has a stem that unites it with the twig. Acompoundleaf is one whose stem bears more than one blade. These small blades are calledleaflets. There are two types of compound leaves, one feather-like, having a main stem with leaflets arranged in two rows on opposite sides of this stem. Such a leaf is feather-like. The other type has a leaf stem with all the leaflets attached at one end. The horse chestnut is the best example of this type. The leaves spread from the end of the stalk somewhat as the fingers rise from the palm of your hand.
The biggest leaves with single blades to be found in our forests grow on trees of the magnolia family. The silver-lined leaves of the large-leaved cucumber tree are over a foot in length, sometimes two and one-half feet, down South. These great leaves are about one-fourth as wide as long, and at the base each one broadensand extends backward into two rounded ear-like lobes. This gives the tree the name, ear-leaved magnolia. The whole leaf flaps in the wind, like the ear of an elephant, and, of course, the wind lashes it into strings and soon robs it of its beauty.
The Northern cucumber tree is another magnolia whose leaves are tropical-looking. This is the hardiest of the magnolia family, and its heart-shaped leaves are six to ten inches long. They are not large for a magnolia of the South, but they look larger because they grow among the small-leaved trees of the Northern states.
The tulip tree has a large leaf of peculiar form. It is broad like a maple leaf at the base, but at the tip it is cut off square as if with a pair of shears, forming a right angle with its straight sides. Sometimes the leaf is notched, as if a V-shaped piece were cut out of the square tip. These leaves are long-stemmed, their blades polished, and they flutter on the twigs with the lightness of a poplar leaf. Once we have in mind the form of the leaf of the tulip tree, we shall never forget it, for it is different from all other leaves.
The catalpa tree, which lifts its great blossom clusters above the foliage in late June, is another of the few large-leaved trees of the North. The single blade is heart-shaped, six to eight incheslong, and more than half as broad. These leaves usually have plain margins, but sometimes they are wavy and notched near the base so as to produce faint side lobes. The blades hang on long, stout stems.
Among the feather-leaved trees, the walnuts and butternuts, the sumachs, and the ailanthus, furnish examples. A black walnut leaf is often two feet long, with a dozen or more leaflets on the longest ones. These leaflets are always set opposite in pairs, with an odd one on the tip of the leaf stem. Butternut leaves have the same form, but the leaves are longer. They range from fifteen to thirty inches, and have from ten to twenty leaflets, but always an odd number. The peculiar gummy feeling of these hairy leaves, and their pungent butternut odour when bruised, make it easy to know the tree wherever we meet it, through the long summer.
The hickories are cousins of the walnuts, but their leaves, though of the feather form, have larger and fewer leaflets than any walnut tree. A shagbark hickory leaf has one or two pairs of little leaflets on the stem, and above them three of larger size. The pignut has the same habit of clustering its three largest leaves at the tip of the leaf stem, and tapering off at the base with one or two pairs of decreasing size.
The largest of all the compound leaves have branched stems to which leaflets are attached. The main leaf stem’s side branches may yet branch again, forming a twice-branched framework that is set with leaflets, not large, but so numerous as to make the whole leaf surprisingly large. The greatest of these twice-compound leaves is borne by that astonishing, spiny-stemmed Hercules’ club. A single leaf is often four feet long, and nearly a yard wide. There are no leaflets on the main stem; they are on the side branches.
How shall we tell a leaf stem from a twig? Leaf stems do not look like the twigs of the tree. A little practice in looking closely and comparing these leaf stems and twigs will obviate any confusion of the two. The leaf has a bud at its base, and it breaks off easily at this joint.
The sugar maple trees are tapped in February; they bloom in May after the leaves come out; they ripen their keys in October, when the foliage turns to red and yellow.The sugar maple trees are tapped in February; they bloom in May after the leaves come out; they ripen their keys in October, when the foliage turns to red and yellow.
The sugar maple trees are tapped in February; they bloom in May after the leaves come out; they ripen their keys in October, when the foliage turns to red and yellow.
Leaves of black willow have frills at their bases. Twigs of pussy-willows, cut and brought indoors, can be forced into bloom in midwinterLeaves of black willow have frills at their bases. Twigs of pussy-willows, cut and brought indoors, can be forced into bloom in midwinter
Leaves of black willow have frills at their bases. Twigs of pussy-willows, cut and brought indoors, can be forced into bloom in midwinter
Among the fine, feathery leaves that are so beautiful and light that they give great beauty to the tree tops are those of the honey locust. These leaves are of the feather type, the slender stems, with double rows of tiny leaflets. Very often we find among the single feather forms, leaves of greater size, which have branched stems. This branching multiplies the number of leaflets, and gives us, on the same trees, what the botanistscallonce compound, andtwice compoundleaves. The simple feather and the branched feather forms add greatly to the beauty and luxuriance of the foliage of the honey locust.
The common black locust of the roadside has single leaf stems with oblong leaflets set in opposite rows upon it. Ash trees have the same feather type of leaves, the leaflets usually pointed and oval, and always an odd one at the tip. They are all larger than leaves of the locusts.
In the maple family there is a broad, simple blade, about as wide as it is long. It is a family trait to have three main veins running out from the end of the leaf stem, into the blade. Each of these veins has side branches, and they are connected with a network of smaller veins. Between the tips of these three main veins the leaf is usually notched, so as to divide it into thirds. In the red maple these notches are shallow V’s cut out, leaving triangular points. In the silver maple the leaves are cut by deeper clefts, which reach more than half-way to the leaf stalk. The three lobes are cut with jagged points into an uneven margin. The sugar maple has its three lobes separated by wide, deep clefts, and its margins are irregularly wavy. The box elder, which is a maple, is cleft so deeply that the blade is split into three distinct leaflets, each with its ownshort stem. This makes a compound leaf of it. It is the only maple with a leaf of more than one blade.
The tree which shows the greatest difference in the form of its leaves is the sassafras, whose oval leaves grow on the same stem with mittens and double mittens—a mitten pattern with a thumb on each side. The hawthorns have small oval leaves with variously cleft borders. There are over a hundred kinds of hawthorns in our woods, and each kind has a leaf different from all the rest; yet a single tree will often show leaves that differ so much from the others in form that we might easily suspect, if some one brought them to us, that each grew on a different tree from all the rest.
Many oak trees have the same habit of leaf variation, so that even a forester has to examine many leaves with care, and with them the buds and the acorns, to make sure that he has called the oak by its right name.
The behaviour of the leaves of a tree depends largely on the length and flexibility of their stems. If they are long, and slender, and supple, the tree-top is in a continual flutter when the wind blows. If they are thick and stiff, they do not catch the breeze as readily, and their blades lie comparatively still when other trees near by maybe twinkling and trembling. Leaves with deeply cut borders, like some oaks and maples, flutter much more than leaves like the basswood, whose borders are unbroken. Oak leaves that are deeply cut will rarely lie down flat. The curving bays in its borders cause the leaf to curl, so that no matter what face is presented, the wind gets under and strikes some surface, and sets the leaf to dancing.
The flat leaf stems of the trembling aspen, one of the poplar family, are very flexible, and they are flattened at right angles to the blades of the leaves. When a breeze comes by, it may strike the edge of the leaf, but if so, it catches the flat leaf stem broadside. If it comes from any other direction the leaf trembles, because one of the blades is sure to receive the force of the wind. So the tree top is in one constant tremor, even when the breeze is scarcely sufficient to disturb broad-leaved trees which are near neighbours of the aspens.
Whatever the form and size and shape of its leaf, the tree depends upon its foliage mass for all the life it enjoys, and for all the growth it makes. The soil and the air feed the tree. The leaves and the sun do the work of digesting the food. In the porous wood and bark are the channels through which sap mounts upward tothe leaves, and another set of channels which carry the prepared food back, leaving it wherever needed, along the way from tip of twig to tip of root. Whatever is not needed is stored away, to be dissolved as needed and carried to the points where the need is. In spring it is the growing buds that chiefly need this stored food. Its presence explains the miracle of the bursting of blossoms and leaves when spring comes.
One by one the trees of your own yard may be learned by name this summer. The leaves are your sure guide. Trees stay where they are. Once we recognise their leaves and call them by name, we may depend upon finding them still standing the next day we pass them, and their leaves are still held out as the sign of recognition. Every time we pass yonder red maple let us glance at its three-pointed leaf, and fix its shape indelibly in the mind. When we have done this a dozen times, I am sure that we shall be able to pick out all the red maples in town; and if we journey far from home we may find and recognise the same kind of trees by the same sign. More and more as we grow older, we find out that half the pleasure of travelling is the occasional meeting with old friends, be they people or trees.