Image not available: Portion of plan showing Yuccas, Pampas grass, Tritomas, Retinospora, Acanthus latifolius, Arundo Donax variegata, etc., irregularly isolated on the grass.Portion of plan showing Yuccas, Pampas grass, Tritomas, Retinospora, Acanthus latifolius, Arundo Donax variegata, etc., irregularly isolated on the grass.
One kind of arrangement needs to be particularly guarded against—the geometro-picturesque one, seen in some parts of the London parks devoted to subtropical gardening. The plants are very oftenof the finest kinds and in the most robust health, all the materials for the best results are abundant, and yet the scene fails to satisfy the eye, from the needless formality of many of the beds, produced by the heaping together of a great number of species of one kind in long straight or twisting masses with high raised edges frequently of hard-beaten soil. Many people will not see their way to obliterate the formality of the beds, but assuredly we need not do so to get rid of such effective formality as that shown in the accompanying figure!
Image not available: Formal arrangements in London parks.Formal arrangements in London parks.
The formality of the true geometrical garden is charming to many to whom this style is offensive; and there is not the slightest reason why the most beautiful combinations of fine-leaved and fine-flowered plants should not be made in any kind of geometrical garden.
But in the purely picturesque garden it is asneedless, as it is in false taste, to follow the course here pointed out. Hardy plants may be isolated on the turf, and may be arranged in beautiful irregular groups, with the turf also for a carpet, or some graceful spray of hardy trailing plants. Beds may be readily placed so that no such objectionable stage-like results will be seen as those shown in the preceding figure: tender plants may be grouped as freely as may be desired—a formal edge avoided by the turf being allowed to play irregularly under and along the margins, while the remaining bare ground beneath the tall plants may be quickly covered with some fast-growing annuals like Mignonette or Nolanas, some soft-spreading bedding plants like Lobelias or Petunias, or subjects still more peculiarly suited for this purpose, such as the common Lycopodium denticulatum and Tradescantia discolor. Choice tender specimens of Tree ferns, etc., placed in dark shady dells, may be plunged to the rims of the pots in the turf or earth, and some graceful or bold trailing herb placed round the cavity so as to conceal it; and in this way such results may be attained as those indicated in the first plate, in those showing the Dimorphanthus, Musa Ensete, and in the frontispiece. The day will come whenwe shall be as anxious to avoid all formal twirlings in our gardens as we now are to have them perpetrated in them by landscape-gardeners of great repute for applying wall-paper or fire-shovel patterns to the surface of the reluctant earth, and when we shall no more think of tolerating in a garden such a scene as that shown in the preceding figure, than a landscape artist would tolerate it in a picture.
The old landscape-gardening dogma, which tells us we cannot have all the wild beauty of nature in our gardens, and may as well resign ourselves to the compass, and the level, and the defined daub of colour and pudding-like heaps of shrubs, had some faint force when our materials for gardening were few,[A]but considering our present rich and, to a great extent, unused stores from every clime, and from almost every important section of the vegetable kingdom, it is demonstrably false and foolish.
[A]“In gardening, the materials of the scene are few, and those few unwieldy, and the artist must often content himself with the reflection that he has given the best disposition in his power to the scanty and intractable materials of nature.”—Allison.
[A]“In gardening, the materials of the scene are few, and those few unwieldy, and the artist must often content himself with the reflection that he has given the best disposition in his power to the scanty and intractable materials of nature.”—Allison.
To these observations on arrangement, etc., one good rule may be added:—Make your garden as distinct as possible from those of your
Image not available: Shady and sheltered Dell, with Tree Ferns and other Stove Plants placed out for the summer.Shady and sheltered Dell, with Tree Ferns and other Stove Plants placed out for the summer.
neighbours—which by no means necessitates a departure from the rules of good taste.
I wish particularly to call attention to the fine effects which may be secured, from the simplest and most easily obtained materials, by using some of our hardy trees and shrubs in the subtropical garden. Our object generally is to secure large and handsome types of leaves; and for this purpose we usually place in the open air young plants of exotic trees, taking them in again in autumn; and, perhaps, as we never see them but in a diminutive state, we often forget that, when branched into a large head in their native countries, they are not a whit more remarkable in foliage than many of the trees of our pleasure-grounds. Thus, if the well-known Paulownia imperialis were too tender to stand our winters, and if we were accustomed to see it only in a young and simple-stemmed condition and with large leaves, we should doubtless plant it out every summer as we do the Ferdinanda. There is no occasion whatever to resort to exotic subjects, while we can so easily obtain fine hardy subjects—which, moreover, may be grown by everybody and everywhere. By annually cutting down young plants of various hardy trees and shrubs, and letting them make a clean,simple-stemmed growth every year, we will, as a rule, obtain finer effects than can be got from tender ones. The Ailantus, for example, treated in this way, gives us as fine a type of pinnate leaf as can be desired. Nobody need place Astrapæa Wallichii in the open air, as I have seen done, so long as a simple-stemmed young plant of the Paulownia makes such a column of magnificent leaves. The delicately-cut leaves of the Gleditschias, borne on strong young stems, would be as pretty as those of any fern; and so in the case of various other hardy trees and shrubs. Persons in the coldest and least favourable parts of the country need not doubt of being able to obtain as fine types of foliage as they can desire, by selecting a dozen kinds of hardy trees and treating them in this way. What may be done in this way, in one case, is shown in the accompanying plate, representing a young plant of Ailantus, with its current year’s shoot and leaves, standing gracefully in the midst of a bed of Cannas.
A few words may now be added about some types of vegetation which, though not included among what are commonly termed subtropical plants, may yet be judiciously used in combination with them, and go far to produce very charming effects.
Image not available: AILANTUS AND CANNAS Suggesting the effects to be obtained from young and vigorous specimens of hardy fine-leaved trees.AILANTUS AND CANNASSuggesting the effects to be obtained from young and vigorous specimens of hardy fine-leaved trees.
Among conifers we find many subjects of the most exquisite grace, and of a beautiful free and pointed habit, which it is most desirable we should have associated with vegetation more distinguished for brilliancy than grace. They are in many cases as elegantly chiselled and dissected as the finest fern, and it is difficult to find more beautiful masses of verdure than such plants as Retinospora plumosa and R. obtusa display when well developed; they are simply invaluable for those who use them with taste. Apart altogether from our want of a more elegantly diversified surface in the flower-garden—the best and most practical way to meet which is by the use of such plants as these and neat and elegant young specimens of such things as Thujopsis borealis—there is, in many British gardens, a great gulf between the larger tree and shrub vegetation and the humbler colouring material, which most will admit should be filled up, and there is nothing more suitable for it than the many graceful conifers we now possess. Much as conifers are grown with us, how few people have any idea of their great value as ornamental plants for the very choicest position in a garden! We are sometimes too apt to put them in what is called their “proper place,”—or, at all events, too far from the seat ofinterest to thoroughly enjoy them in winter, when the beauty of their form and their exquisite verdure are best seen. If the dwarfer and choicer conifers were tastefully disposed in and immediately around a flower-garden not altogether spoiled by a profusion of beds for masses of colour, that flower-garden could hardly fail to look as well in winter as in summer; in fact I have seen places where, from rather close association of the more elegant types, the best kind of winter garden was made. Our efforts must tend to prevent a desert-like aspect at any time of the year; and to this end nothing can help us more than a judicious selection of conifers. Almost every beauty of form is theirs. They possess a permanent dignity and interest, always occupying the ground and embellishing it, displaying distinct tints of ever-grateful green in spring and summer, waving majestically before the gusts of autumn, and beautiful when bearing on their deepest green the snows of winter. Some of the more suitable kinds are named in a list at the end of this book, but the graceful pines are so commonly grown that few will have any difficulty in securing proper sorts.
The Gourd tribe is capable, if properly used, of adding much remarkable beauty and character to
Image not available: Young Conifers and hardy fine-leaved Plants.Young Conifers and hardy fine-leaved Plants.
the garden; yet, as a rule, it is seldom used. There is no natural order more wonderful in the variety and singular shapes of its fruit than that to which the melon, cucumber, and vegetable marrow belong. From the writhing Snake-cucumber, which hangs down four or five feet long from its stem, to the round enormous giant pumpkin or gourd, the grotesque variation, both in colour and shape and size, is marvellous. There are some pretty little gourds which do not weigh more than half an ounce when ripe; while, on the other hand, there are kinds with fruit almost large enough to make a sponge bath. Eggs, bottles, gooseberries, clubs, caskets, folded umbrellas, balls, vases, urns, small balloons,—all have their likenesses in the gourd family. Those who have seen a good collection of them will be able to understand Nathaniel Hawthorne’s enthusiasm about these quaint and graceful vegetable forms when he says: “A hundred gourds in my garden were worthy, in my eyes at least, of being rendered indestructible in marble. If ever Providence (but I know it never will) should assign me a superfluity of gold, part of it shall be expended for a service of plate, or most delicate porcelain, to be wrought into the shape of gourds gatheredfrom vines which I will plant with my own hands. As dishes for containing vegetables they would be peculiarly appropriate. Gazing at them, I felt that by my agency something worth living for had been done. A new substance was born into the world. They were real and tangible existences, which the mind could seize hold of and rejoice in.” Of course the climate of New England is much better suited for fully developing the gourd tribe than ours, but it is satisfactory to know that they may be readily and beautifully grown in this country.
Image not available: GourdsGourds
There are many positions in gardens in which they might be grown with great advantage; on low trellises, depending from the edges of raised beds, the smaller and medium-sized kinds trained over arches or arched trellis-work, covering banks, or on the ordinary level earth of the garden. Isolated, too, some kinds would look very effective, and in fact there is hardly any limit to the uses to which they might be applied. In the Royal BotanicGardens at Dublin, there is a singular wigwam made by placing a number of dead branches so as to form the framework, and then planting Aristolochia Sipho all round these. It runs over them, and the large leaves make a perfect summer roof. A similar tent might be made with the free-growing gourds, and it would have the additional merit of suspending some of the most singular, graceful, and gigantic of all known fruits from the roof. A few words on their culture, and a selection of kinds, occur at the end of the book.
Although some Ferns are named in the descriptive part of this book, it is desirable to allude to the family here. Why do we always put ferns in the shade, when many of the best and hardiest kinds grow freely in the full sun if sufficiently moist at the root? Why do we always confine them to the fernery proper, when there are so many other places that could be graced by their presence? The very highest beauty of form might be added to beds of low flowers, by the introduction of such ferns as the Struthiopteris, Pteris, Lastrea, etc., while they should also be freely planted in various parts of the pleasure-ground, either alone, or grouped with the Acanthuses and other hardy fine-leaved plants. Not a few of theUmbelliferous plants recommended have foliage as finely cut as any of the Ferns, and would associate very well with them. Even in cases where the soil might not be suitable for ferns, it would, instead of confining them to the fernery proper, be much better to arrange for having small groups or beds of them in places alongside of shady wood-walks or similar positions. By reference to the Osmunda article, it will be seen how these have been grown to magnificent proportions. It may be easily imagined that groups of fine ferns, grown to the luxuriance there described, would contrast with and relieve groups of the brilliant flowers in a superb way.
As the culture of most of the subjects has been sufficiently spoken of in the descriptive part, it is needless to say much of it here, but a few general remarks may help to make the matter clearer to the amateur. It is hoped that the greater number of the hardy subjects enumerated will sufficiently prove that it is not only those persons who have streets of glass-houses to whom the luxury of “subtropical gardening” is accessible. Once placed in suitable soil and position, these hardy kinds may, as a rule, be left to take care of themselves.
A great number of subjects, like the Ricinusand the Annuals, may be considered practically hardy, inasmuch as they only require to be raised in warm or cool frames, or even (some of them) in the open air. When once planted out for the summer, they give but little further trouble.
In the next group may be placed the tender greenhouse kinds; long-lived subjects, like the Dracænas, American Aloe, etc., which thrive in greenhouses or conservatories in winter, and are great ornaments there, and which may be placed in the open air in summer without the least injury. Next to the hardy group, this is the most important, from the fact that the subjects are effective at all seasons of the year, and useful indoors as well as without. They also, unlike the following, may be enjoyed by every one who possesses any kind of a cool glazed structure; and even, in some cases, this is not needed, for I have seen some very fine specimens of Agave americana kept in a large entrance hall in winter, and put out of doors in May to be taken in again in October.
Lastly, we have the least important group of all, and happily also the most costly, viz., those plants which must be kept through the winter and spring in warm stoves, such as Ferdinanda, Solanum, etc. Considering the vast number of hardy and half-hardyplants from which we may select, this type is not worthy of encouragement in gardens generally, with the exception of a few fine things, such as Polymnia grandis. They may, for the sake of convenience, be considered in two sections: those, like the Polymnia, that should be put out in a young state, and which make a fresh and handsome growth during the summer months; and those which, like the Monstera and Anthurium acaule, make no growth whatever during that season. It need not be said that the first section is by far the most important: it comprises the Wigandia, and some of the noblest things used in this way. Plants of the other section can, in the nature of things, be tried in but few places in this country; they are too expensive, and they are not the most effective: but some persons no doubt may take a pleasure in showing what will endure the open air, even if useless for any other purpose. One general rule may be applied to these last-named subjects—they should be allowed to make a strong growth in the hothouse in spring or early summer, and to mature, and, so to speak, harden off that growth before being placed in the open air early in June, or even later if the season be unfavourable.
Speaking generally of all the tender subjectsused, it is necessary to discriminate between kinds that should be planted out in a young state every year, and those which are valuable in proportion to their age and size. Some plants are all the better the higher and larger they are grown; others must be started in a dwarf fresh state every year, or, if not, their foliage will not possess that pristine freshness which charms us when they are properly treated. A large plant of Polymnia grandis, for example, would, if placed in the open air in early summer, speedily become a far from attractive object, while a young plant of the same kind, put out on the same day, would soon produce and carry to the end of the season a mass of fresh and noble leaves. But of course this only applies to kinds that grow rapidly during the summer months in our climate.
With respect to the preparation of the beds for the finer subtropical plants, a peculiar mode is practised in Battersea Park. Here many of the beds are raised above the level of the ground, and underneath and around the mass of light rich soil is a good layer of brick-rubbish, as shown in the accompanying engraving. The soil is first excavated and thrown round the margin of the bed; then the brick-rubbish is put in on the bottom and
Image not available: Section of raised bed at Battersea, with brick-rubbish beneath and around the soil.Section of raised bed at Battersea, with brick-rubbish beneath and around the soil.
around the sides also, raising the bed somewhat above the level of the ground; the cavity in the centre is then filled up, generally with fine light rich soil, using as much of the soil that was dug out as is fit to be used, and arranging the remainder round the edge of the raised bed, covering it neatly with turf. The soil may vary in depth from three feet to eighteen inches, according to the kinds of plants to be grown in it. In this way, by presenting a larger surface to the sun, it is considered that a greater amount of heat is obtained; but I certainly think the advantages of the method are not so great in this way as is generally supposed, and that it is quite needless to adopt it in the case of the great majority of subjects. Its chief merit probably is that it secures a better drainage. Good drainage is undoubtedly indispensable, and,still more so, a thoroughly rich and light mass of deep soil, with abundance of water; without these two last conditions it is hopeless to expect a free rich growth, which is the great charm of these plants. Ricinus, Cannas, Ferdinanda, and some of the freer-growing kinds certainly succeed perfectly without any such arrangement as that above described. The more delicate kinds, such as the Solanums and Wigandia macrophylla, would be those most likely to be benefited by it. It is needless to say, that the numerous fine and hardy subjects enumerated in Part II. do not require anything of the kind, although they too will, as a rule, be fine in proportion to the care bestowed in securing for them a deep and rich body of soil.
One most essential matter is the securing of as perfect shelter as is possible. Warm, sunny, and thoroughly sheltered dells should be chosen where convenient; and, in any case, positions which are sheltered should be selected, as the leaves of all the better kinds suffer very much from strong winds, from which they will be protected if judiciously planted near sheltering banks and trees. Even in quite level districts it will be possible to secure shelter, by planting trees of various kinds, among which such graceful conifers as Thujopsisborealis, Thuja gigantea (true), Cupressus macrocarpa, Cryptomeria elegans, etc., should be freely used in the foreground, as in beauty of form they are unsurpassed by any short-lived inhabitants of the summer garden. Except, however, in the case of the Tree-ferns, and various other things not grown in the open air but simply placed there for the summer, it is very desirable not to place the plants in the shade of trees. All the things which have togrowin the open air should be placed in the full sun. Not a few hardy subjects will thrive very well without any but ordinary shelter, as, for example, the Yuccas and Acanthuses; but, judging by the remarkable way in which the hardy Bamboo thrives when placed in a sheltered dell, shelter has a considerable influence on the well-being even of these, as it must have on all subjects with large leaf-surfaces. But it should not be forgotten that shelter may be well secured without placing the beds or groups so near trees that they will be robbed, shaded, or otherwise injured by them.
W. R.
March 1, 1871.
DESCRIPTION, ARRANGEMENT, CULTURE, ETC., OF SUITABLE SPECIES, HARDY AND TENDER, ALPHABETICALLY ARRANGED.
SUBTROPICAL GARDENING.PART II.
[*]Acacia Julibrissin.—A native of Persia, with large and elegant much-divided leaves, and flowers somewhat like short tinted brushes from the numerous purple stamens. Though this does not succeed as a standard tree in all parts of England (where it grows well against walls, and sometimes flowers), yet doubtless it would do so in some parts of the south, and I have seen it make presentable standards about Geneva and in Anjou. But for our purposes it is better that it should not be perfectly hardy, as by confining it to a single young stem and using young plants, or plants that have been cut down every year, we shall get an erect stem covered with leaves more graceful than a fern, and that is the kind of ornament we want as a graceful object amidst low-growing flowers. The leaves, like those of some other plants of the pea tribe, are slightly sensitive. On fine sunny days they spread out fully and afford a pleasant shade; on dull ones the leaflets fall down. This interesting phenomenon takes place with other members of the same family—for instance, the elegantA. dealbataofour conservatories. Seed ofA. Julibrissin—or the silk-rose, as it is called by the Persians in consequence of its silky stamens—is readily obtained, and it is much better raised from seed, as then you get those single-stemmed and vigorous young plants which are to the flower-garden what an elegant fern is to the conservatory or show-house. To succeed with it in the way above named, it may be protected at the root and cut down every year in spring, or strong young plants may be put out annually, in much the same way as those ofA. lophantha.
[*]The names of all hardy species and other kinds easily raised from seed in spring (the kinds useful in all classes of garden), are preceded by an asterisk.
[*]The names of all hardy species and other kinds easily raised from seed in spring (the kinds useful in all classes of garden), are preceded by an asterisk.
Acacia lophantha.—This elegant plant, though not hardy, is one of those which all may enjoy, from the freedom with which it grows in the open air in summer. It will prove more useful for the flower-garden than it has ever been for the houses, and, being easily raised, is entitled to a place here among the very best. The elegance of its leaves and its quick growth in the open air make it quite a boon to the flower-gardener who wishes to establish graceful verdure amongst the brighter ornaments of his parterre. It has graceful fern-like leaves and a close and erect habit, which permits us to closely associate it with flowering plants without in the least shading them or robbing them. Of course I speak of it in the young and single-stemmed condition, the way in which it should be used. By confining it to a single stem and using it in a young state, you get the fullest size and grace of which the leaves are capable. Allow it to become old and branched, and it may be useful, but by no means so much so as when young and without side branches. It may be raised from seed as easily as a common bedding plant. By sowing it early
Image not available: ACANTHUS LATIFOLIUS (lusitanicus). Ornamental foliaged herbaceous Section; retaining its leaves till very late in the year.ACANTHUS LATIFOLIUS (lusitanicus).Ornamental foliaged herbaceous Section; retaining its leaves till very late in the year.
in the year it may be had fit for use by the first of June; but plants a year old or so, stiff, strong, and well hardened off for planting out at the end of May, are the best. It would be desirable to raise an annual stock, as it is almost as useful for room-decoration as for the garden. Native of New Holland.
Thesestout and hardy herbaceous plants are of the greatest importance in the subtropical garden or the pleasure-ground, their effect being very good when they are well established. They thrive in almost any soil, but attain their greatest luxuriance and beauty in deep warm ones. The best uses for these species are as isolated tufts in the grass, in the mixed border, or in picturesque groups with other hardy subjects. In all cases they should be placed in positions where they are not likely to be disturbed, as their beauty is not seen until they are well established. All are easily propagated by division. Few herbaceous genera may be made more useful than this.
*Acanthus hirsutus.—This uncommon species has a narrow spiny leaf, more in the way ofMorina longifoliathan the ordinary Acanthuses, and is dark green in hue. The leaves grow to a length of about 15 ins. or 16 ins. in ordinary soil. Being distinct, it may be worth growing, though in point of character or importance it is inferior to the larger kinds. South of Europe.
*Acanthus latifolius.—The leaves of this are bold and noble in outline, and the plant has a tendency, rarein some hardy things with otherwise fine qualities, to retain them till the end of the season without losing a particle of their freshness and polished verdure. In fact, the only thing we have to decide about this subject is, what is the best place for it? Now, it is one of those things that will not disgrace any position, and will prove equally at home in the centre of the mixed border, projected in the grass a little from the edge of a choice shrubbery, or in the flower-garden; nobody need fear its displaying anything like the seediness which such things as the Heracleums show at the end of summer. I should not like to advise its being planted in the centre of a flower-bed, or in any other position where it would be disturbed; but in case it were determined to plant permanent groups of fine-leaved hardy plants, then indeed it could be used with great success. Supposing we have an irregular kind of flower-garden or pleasure-ground to deal with (a common case), one of the best things to do with this Acanthus is to plant it in the grass, at some distance from the clumps, and perhaps near a few other things of like character. It is better than any kind of Acanthus hitherto commonly cultivated, though one or two of these are fine. Give it deep good soil, and do not grudge it this attention, because, unlike tender plants, it will not trouble you again for a long time. Nobody seems to know from whence it came. Probably it is a variety ofAcanthus mollis. The plant varies a good deal; I have seen specimens of it about a foot high, with leaves comparatively small and stiff and rigid, as if cast in a mould, by the side of others of thrice that development, and of the usual texture.
*Acanthus longifolius.—A fine, distinct, and new species from Dalmatia and S. Europe, 3½ ft. to 4 ft. high, distinguished fromA. mollis(to which it is allied) by the length and narrowness of its arching leaves. They are about 2½ ft. long, very numerous, of a bright green colour, growing at first erect, then inclining and forming a sheaf-like tuft, which has a very fine effect. The flowers are of a wine-red colour, becoming lighter before they fall. A specimen in the gardens of the Museum at Paris, in four years after planting, had twenty-five blooming-stems rising from the midst of a round mass of verdure nearly 2½ ft. in height and width. This would be very effective on the undulating and picturesque parts of landscape-gardens. It does not run so much at the root asA. mollis. It seeds more freely than the other kinds, and may be readily increased by seeds as well as by division. Its free-flowering quality makes this species peculiarly valuable, while it is as good as any for isolation or grouping.
*Acanthus mollis.—A well-known old border-plant from the south of Europe, about 3 ft. high, with leaves nearly 2 ft. long by 1 ft. broad, heart-shaped in outline, and cut into angular toothed lobes. The flowers are white or lilac, the inflorescence forming a remarkable-looking spike, half the length of the stem. Well adapted for borders, isolation, margins of shrubberies, and semi-wild places, in deep ordinary soil, the richer the better. Increased by division of the roots in winter or early spring.
*Acanthus spinosissimus.—This is in all respects among the finest of thoroughly hardy “foliage-plants,”growing to a height of 3½ ft., and bearing rosy-flesh-coloured flowers in spikes of a foot or more in length. It is perfectly hardy, very free in growth, and is quite distinct from any of the other species, forming roundish masses of dark-green leaves, with rather a profusion of glistening spines, by which it is known immediately from its relatives. As a permanent object, fit to plant in a nook in the pleasure-ground or on the grass, associated with the nobler grasses or other plants, there is nothing to surpass it. I know of no hardy foliage-plant so thoroughly neat in its habit at all times. It does not often flower; and if it should throw up a spike, it will perhaps be no loss to cut it off, as its leaves are its best ornament, though the flowers too are interesting. Never at any time does it require the least attention; it will stand any exposure; and is, in a word, invaluable as a hardy ornamental plant. It will thrive best in good and deep soil. South of Europe.
*Acanthus spinosus.—This species appears to flower well more regularly than any other. Its leaves are rather narrow, and very deeply divided into almost triangular segments: they are also covered with short spines. The flowering-stems are about 3 ft. high, and bear dense spikes of purplish flowers. Useful for borders, or grouping with the other kinds and plants of similar character and size. South of Europe.
*Adiantum pedatum.—This fern, which abounds in the woods of Canada and the United States, is unquestionably one of the most elegant of those which are able to endure the climate of Britain, and grows from 16 ins. to 20 ins. high. From the tops of the erect black stemsthe fronds branch and spread horizontally in a very graceful and peculiar manner. The leaflets are slightly wedge-shaped, the upper margin resembling an arc of a circle. The American Maiden-hair flourishes in a light cool soil, and in a half-shaded position, or in a coarsely-broken, shallow, turfy peat soil, covered with a layer of moss to keep it constantly cool. It is commonly grown in the greenhouse with us, but is especially adapted for embellishing the low and shady parts of rockwork, and for ornamenting beds and mounds of peaty soil which have a north aspect or are sheltered from the full sun. It is propagated by division of the tufts in autumn or early spring. If done in autumn, the divisions should be potted and placed under a frame for the winter, as they form new roots more readily if so treated. There can be no question that, if planted in rich moist soil in a shady wood, we should have no trouble in naturalising this graceful fern, the fronds of which are such graceful objects in the dense woods of the “great country.”
Agave americana.—This and its variegated varieties are plants peculiarly suited for subtropical gardening, being useful for placing out of doors in summer in vases, tubs, or pots plunged in the ground, and also for the conservatory in winter. It forms a large rosette of thick fleshy leaves of a glaucous ashy-green colour, overlapping each other at the base, from 4 ft. to 6½ ft. long, and from 6 ins. to 10 ins. broad, ending in a strong spine, and having numerous spines along the margin. When the plant flowers, which it does only once, and after several years’ growth, it sends up a flowering-stemfrom 26 ft. to nearly 40 ft. high. The flowers are of a yellowish-green colour, and are very numerous on the ends of the chandelier-like branches. It will grow in any moderately dry greenhouse or conservatory in winter, or even in a large hall, and may be placed out of doors at the end of May and brought in in October. All the varieties are easily increased from suckers. N. America.
*Agrostis nebulosa.—This beautiful annual grass forms most delicate feathery tufts about 1 ft. or 15 ins. in height, terminated when in flower by graceful panicles of spikelets, which are at first of a reddish-green colour, and afterwards change to a light red in the upper part, the remaining two-thirds being of a deep green: the pedicels are extremely slender and of a violet colour. It forms very handsome edgings, and is very valuable for bouquets, vases, baskets, room and table decoration, etc. If cut shortly before the seed ripens, and dried in the shade, it will keep for a long time. Dyed in various colours it is much used by makers of artificial flowers. It may be sown either in September or in April or May. In the former case it will flower from May to July, in the latter from July to September. The seed, being very fine, should be only slightly covered. Though small, this deserves a place in groups of the finer and dwarfer plants, such asThalictrum minus, and also in herbaceous borders. Spain.
*Ailantus glandulosa.—Much trouble and expense are incurred in the purchase, growth, and protection of tender plants with fine compound leaves like this, but which in our climate never display anything like the fresh vigour, health, spotless appearance, and youthfulgrace characteristic of hardy subjects. This is one of the most valuable of the hardy trees which, if kept in a dwarf state by being planted young and cut down annually, will furnish as good an effect as any tropical plant. The Ailantus should be kept in a young state, with a single stem clothed with its superb pinnate leaves; and we can readily keep it in this form by planting it young and cutting it down annually, taking care to prevent it from breaking into an irregular head, as then the symmetry of the leaf beauty becomes confused and is not at all so effective as when it is kept to a single stem. Vigorous young plants and suckers in good soil will produce handsome, arching, elegantly divided leaves 5 ft. and even 6 ft. long, not to be surpassed by those of any stove-plant. Under such treatment it could be grown conveniently to about from 4 ft. to 7 ft. high, and would thus do grandly for association with the larger class of garden flowers—Gladioli, Dahlias, and Hollyhocks, for example—while among Cannas and the like it will prove fine. The leaves are not liable to be attacked by insects—a good point in a plant used for the purpose I suggest—and they retain their healthy green till the first frosts in November, when they suddenly drop off. It is propagated with facility by cuttings of the roots, but is cheap in all nurseries. China and Japan.
*Aira pulchella.—One of the most ornamental grasses, with numerous hair-like stems, growing in light elegant tufts 6 ins. to 8 ins. high. It is useful for forming very handsome edgings, or for interspersing amongst plants in borders, or growing in vases or pots for room-decoration.Its delicate panicles give an additional charm to the finest bouquets. May be sown either in September or in April. S. Europe.
*Alisma Plantago.—A native perennial water-plant, growing nearly 3 ft. high, and bearing a very handsome pyramidal panicle of rosy-white flowers from June to September. The leaves are oval-lance-shaped with a cordate base, and are borne nearly erect on long stalks for some distance above the surface of the water. A graceful object on the margins of ponds, lakes, etc., where a plant of it transferred from any place where it grows will soon increase.
Alsophila excelsa.—A noble tree-fern, native of Norfolk Island, where it attains a height of 40 ft., crowned with a magnificent circular crest of bipinnate fronds. These fronds or branches fall off every year, leaving an indentation in the trunk. It stands well in the open air in this country in shady, moist, and thoroughly well sheltered places. It should be put out at the end of May, and taken indoors at the end of September or early in October, and receive warm-greenhouse or temperate-house treatment in winter. The same remarks apply toA. australis, and probably others of the family will be found to thrive well in the open air when sufficiently plentiful to be tried in that position.
Amongthe common annuals of our gardens I know of none more in want of judicious use and appreciation than these. The few we grow are usually treated as roughcommon annuals, and sown so thickly that they never attain half their true development, or never fulfil any of the graceful uses for which they are adapted. But the family possesses greater claims on our attention by reason of the more recent additions to it. The old “Love lies bleeding” (A. caudatus), with its dark-red pendent racemes, is a very striking object when well grown, butA. speciosusand some of the more recent varieties are still more so.
*Amarantus caudatus.—A hardy and vigorous-growing species, from 2 ft. to 3¼ ft. high. Flowers from July to September, dark purplish, very small, collected in numerous whorls, which are disposed in drooping spikes so as to form a handsome pendent panicle. There is a variety which has yellow flowers and is equally hardy. It is advisable to give this plant plenty of room to spread; otherwise much of its picturesque effect will be lost; and to use it in positions where its fine and peculiar habit may be seen to advantage,—as, for example, in large vases, edges of large beds of subtropical plants, or dotted among low-growing flowering plants. Although as easily raised as any common annual, it deserves to be properly thinned out, and each plant isolated in rich ground, so that it may attain its full size. E. Indies.
*Amarantus sanguineus.—Is distinguished by the blood-red colour of its leaves, and grows about 3 ft. high. Its purple flowers appear from July to October, disposed partly in small heads in the axils of the upper leaves, and partly in slender, flexible spikes which form a panicle more or less branching. This plant, though a native of the East Indies, is quite hardy, and seems todo best in light soil with plenty of leaf-mould and having a warm aspect. It may be sown in hotbeds in April and pricked out in May, or in the open air at the end of April or beginning of May, and, like the others, should never be allowed to get crowded.
*Amarantus speciosus.—A very large kind, well adapted for associating with subtropical plants, as it grows from 3 ft. to nearly 5 ft. high. The flowers are very numerous, of a dark crimson purple, and arranged in large erect spikes, forming a fine plumy panicle. The leaves are suffused with a reddish tinge. Plants of this species are occasionally met with having leaves with a light green centre surrounded by wavy zones of a reddish hue. This colouring disappears at the time of flowering. It is an effective subject in the autumn months. Culture, the same as for the preceding kind. Nepaul.
*Amarantus tricolor.—Distinguished by the very handsome and remarkable colouring of its leaves, which are of a fine transparent purplish-red, or dark carmine, from the base to the middle. A large spot of lively transparent yellow occupies the greater part of the upper end of the leaf, and sometimes covers it altogether, with the exception of the point, which is mostly green. The leaf-stalk is either of a light green or yellow colour. Sometimes leaves occur which have the lower half green and the upper part red. Another variety (bicolor) has leaves of a tender green variously streaked with light yellow. It is rather delicate, and requires very good soil, and a warm, open aspect. Another variety (bicolor ruber) is hardier than the last-named, and has leaves which are of a brilliant glistening scarlet when young, graduallychanging to a dark violet-red mixed with green. Another variety (ruber) has a more squat and ramified habit, and leaves of a deep rose-colour thickly clothing the stems. Other varieties recommended areelegantissimus(with scarlet leaves),Gordoni,melancholicus ruber, andversicolor, all having some claims as bedding plants. The foliage of these varieties is exceedingly ornamental, and rivals the finest flowers in the richness of its hues. Planted along with large-leaved subjects, such as the Cannas, Wigandias, Ricinus, Solanums, etc., the effect is very fine. They may also be advantageously employed in borders and flower-beds of all sizes, and for fringing the edges of shrubberies. The varieties ofA. tricolorare a little more tender than the other kinds, and a light soil and a warmer position are necessary for them. They do well in gardens by the seaside. They should be sown in April in a hotbed, pricked out in a hotbed, and finally planted permanently about the end of May.A. t. giganteusis described as very fine in recent catalogues of the nurserymen. To these may be added a beautiful new kind,A. salicifolius, in the possession of the Messrs. Veitch, but not yet sent out. It has highly coloured and very long, narrow, and arching leaves, and is a singularly graceful and brilliant object. E. Indies.
*Andropogon squarrosusis a hardy East Indian grass, which survives the winter with but slight protection, making luxuriant tufts seven feet high, or more, when in flower. It would probably make a beautiful object in the warmer and milder parts of England and Ireland in good soil, but it is not a subject which can with confidence be recommended for every garden. However, allwho value fine grasses should try it. Well-drained and deep-sandy loam.
Thisgenus embraces many plants of very diverse aspects, and few that are fitted for the open air in our climate; but in the case ofA. canescens, and its relative (A. spinosa), the Angelica-tree of North America, we have subjects which thrive perfectly well in our gardens, and which in the size and beauty of their leaves are far before many “foliage-plants” carefully cultivated in hothouses at a perpetual expense.
*Aralia canescens.—The specimen of this species figured was one of a batch of young plants growing in a London nursery, and sketched in the summer of 1868. The engraving falls far short of rendering the beauty of the plant. It is easy to imagine what a graceful effect may be realised by such an object, either isolated on the turf near the edge of a shrubbery, or grouped with subjects of similar character. Success with these plants may be secured by first selecting a sheltered and warm position, so that their noble leaves may be well developed and not lacerated by storms when they are fully grown; secondly, by giving them a deep, free, and thoroughly-drained soil; and thirdly, by confining them as a rule to a simple and rather dwarf stem, so that the vigour of the individual may not be wasted in several branches. The effect of a plant kept to a single stem, as shown in the plate, is always much superior to that of a branched one. Young plants present this aspect naturally; but old ones may be cut down,