Chapter X: Part II (6)

=Yuccas.=--Among all the hardy plants ever introduced into this country, none surpass for our present purpose the various kinds of Yucca, or “Adam’s Needle,” as it is commonly called. There are several species hardy and well suited for flower-garden purposes, and, more advantageous still, distinct from each other. The effect afforded by them, when well developed, is equal to that of any hothouse plant that we can venture in the open air for the summer, while they are green and ornamental at all seasons. They may be used in any style of garden, may be grouped together on rustic mounds, or in any other way the taste of the planter may direct. If we had but this family alone, our efforts to produce an agreeable effect with hardy plants could not be fruitless. The free-flowering kinds, _filamentosa_ and _flaccida_, may be associated with any of our nobler autumn flowering plants, from the Gladiolus to the great _Statice latifolia_. The species that do not flower so often, like _pendula_ and _gloriosa_, are simply magnificent as regards their effect when grown in the full sun and planted in good soil; and I need not say bold and handsome groups may be formed by devoting isolated beds to Yuccas alone. They are mostly easy to increase by division of the stem and rhizome; and should in all cases be planted well and singly, beginning with healthy young plants, so as to secure perfectly developed specimens.

=Yucca aloïfolia.=--A fine and distinct species, with a stem when fully developed as thick as a man’s arm, and rising to a height of from 6 ft. to 18 ft. Leaves numerous, rigidly ascending, dark-green, with a slight glaucous bloom, 18 to 21 inches long and broad at the middle, with the horny margin rolled in for 2 ins. or 3 ins. below the point, and finely toothed in the remaining portion. Flowers almost pure white, in a vast pyramidal panicle. This plant is hardy, but the fact is not generally known. It should be tried on well-drained slopes in good sandy loam. There are some varieties, of which _T. a. quadricolor_ and _T. a. versicolor_ have the leaves variously edged with green, yellow, and red. These fine variegated varieties are also very hardy, but as they are as yet far from common, it will be best to utilise them in the greenhouse or conservatory, or place them in the open air during summer. They look very pretty isolated on the grass, the pots plunged to the rim. S. America and W. Indies.

=*Yucca angustifolia.=--A somewhat dwarf species, the whole plant, when in flower, not being more than 2 or 3 ft. high. The leaves are thick and rigid in texture, from 15 ins. to 18 ins. long and about ¼ in. broad, of a pale sea-green colour, with numerous white filaments at the edges. The inflorescence is a simple raceme of white flowers slightly tinged with yellow. Till more plentiful this had better be grown in warm borders, in well-drained sandy loam. N. America.

=*Yucca canaliculata.=--The leaves of this species are entire, _i.e._ neither toothed nor filamentous at the margin, and form a dense rosette on a stem which rises 1 or 2 ft above the ground. Each leaf is from 20 ins. to 24 ins. long, and 2 ins. to 2¼ ins. broad at the middle, very strong and rigid, and deeply concave on the face. The flowers are of a creamy white, in a large panicle 4 ft. to 5 ft. high. Fine for isolation or groups. Till more plentiful should be encouraged in favourable positions and on warm soils. Mexico.

=*Yucca filamentosa.=--A very common and well-known species, with a much-branched panicle, 4 ft. to 6 ft. high, and apple-green leaves, from 15 ins. to 21 ins. long by 1½ ins. to 2 ins. broad at the middle, fringed at the edges with grey filaments 2 or 3 ins. long: the outer leaves spreading, the central ones erect or slightly recurved. This species varies very much when raised from seed: one variety (_concava_) has short, strong, broad leaves, with the face more concave than in the type; another variety (_maxima_) has leaves nearly 2 ft. long by 2½ ins. broad, with a panicle 7 ft. to 8 ft. in height. This species flowers with much vigour and beauty, and is well worth cultivating in every garden; not only in the flower-garden or pleasure-ground, but also on the rough rockwork, or any spot requiring a distinct type of hardy vegetation: and so is its fine though delicate variegated variety. All the varieties thrive best and flower most abundantly in peaty or fine sandy soil. N. America.

=*Yucca flaccida.=--A stemless species, somewhat resembling _Y. filamentosa_, but smaller, with a downy branching panicle 3 ft. to 4 ft. high. Foliage in close rosettes of leaves, 1½ ft. to 2 ft. long, by about 1½ in. broad at the middle, often fringed with filaments on the edges: the young ones nearly erect, the old ones abruptly reflexed at the middle, almost appearing as if broken. This gives such an irregular aspect to the tufts that it at once distinguishes this kind from any of the varieties of _Y. filamentosa_. It also flowers more regularly and abundantly than its relative, and is exceedingly well suited for groups of the finer hardy plants, for borders, or for being planted in large isolated tufts. N. America.

=*Yucca glaucescens.=--A very free-flowering kind, with a panicle 3 ft. to 4 ft. high, the branches of which are short and very downy. Leaves sea-green, about eighteen inches long, with a few filaments on the margins. The flowers are of a greenish-yellow colour, and when in bud are tinged with pink, which tends to give the whole inflorescence a peculiarly pleasing tone. A very useful and ornamental sort--fine for groups, borders, isolation, or placing among low shrubs. N. America.

=*Yucca gloriosa.=--A species of large and imposing proportions, with a distinct habit and somewhat rigid aspect. Flower-stem over 7 ft high, much-branched, and bearing an immense pyramidal panicle, of large, almost pure white flowers. Leaves numerous, stiff, and pointed. One of the noblest plants in our gardens, and suitable for use in almost any position. It varies very much when grown from seed--a good recommendation, as the greater variety of fine form we have the better. The chief varieties in cultivation are _Y. g. longifolia_, _plicata_, _maculata_, _glaucescens_, and _minor_. The soil for this plant should be a rich deep loam. N. America.

=*Yucca pendula.=--The best species perhaps, considering its graceful and noble habit, which is simply invaluable in every garden. It grows about 6½ ft. high, the leaves being at first erect and of a sea-green colour, afterwards becoming reflexed and changing to a deep green. Old and well-established plants of it standing alone on the grass are pictures of grace and symmetry, from the lower leaves which sweep the ground to the central ones that point up as straight as a needle. It is amusing to think of people putting tender plants in the open air, and running with sheets to protect them from the cold and rain of early summer and autumn, while perhaps not a good specimen of this fine thing is to be seen in the place. There is no plant more suited for planting between and associating with flower-beds. N. America.

=*Yucca rupicola.=--A species somewhat resembling _Y. aloïfolia_, with a stem from 4 ft. to 7 ft. high, and pale-green leaves 18 ins. to 20 ins. long, by 1 in. broad at the middle, almost erect and frequently twisted, the horny margin being broader and the teeth more distinct than in _Y. aloïfolia_. This is not much in cultivation as yet, and will probably be difficult to obtain for some time to come. N. America.

=*Yucca Treculeana.=--This species is one of the most remarkable of the noble genus to which it belongs, from its habit, and especially from the dimensions to which its foliage attains. Like many plants of its family,

Hardy evergreen fine-foliaged Type.]

young specimens differ considerably from those which have reached maturity. Thus, while the former have their leaves bent, generally inflected, the full-grown plants exhibit them erect, rigid, very long, and very straight. The stem of this plant is stout, about 10 ins. in diameter, furnished on all sides with leaves about 4 ft. long, straight, thick, deeply channeled, acuminate for a considerable length, and ending in a stiff, very sharp point, very finely toothed on the edges, which are of a brownish red and scarious. The flower-stalk is very stout, about 4 ft. long, much branched; the branches erect, from 1 ft. to 1 ft. 8 ins. long, bearing throughout their entire length flowers with long and narrow petals of a yellowish white, shining, and, as it were, glazed. It is a hardy and very vigorous plant. It is not rare to see on the Continent specimens of more than 6½ ft. in diameter. Fine for banks and knolls, placed singly, or for the boldest groups. It comes from Texas.

=Zea Mays.=--Were our climate a little warmer, we should find this noble grass one of the most ornamental, as well as useful, of our plants. But in countries where it is grown for food they would no more think of honouring it with a place in the garden than we should of planting the artichoke in our flower-beds, though far worse things are done every day. In this country, however, where maize is not to be seen as a field crop, a tuft of its tropical-looking blades has a good effect among the “subtropical plants.” Of course it should only be tried in warm districts, and it should always have sunny and sheltered positions and rich soil. In light warm soils, deep, and with a free bottom, it generally thrives very well, if a foot or so of rich and rotten manure is placed beneath its roots. In some seasons it would here and there ripen seeds, and in all cases one could gather a few heads of “green corn.” In warmer countries it is always best to sow maize in the open ground as soon as the frost permits; but in England it is better to raise it on a gentle hotbed in April, although occasionally it will succeed if sown out of doors. Gradually harden off the plants before they have made more than three or four little leaves, keeping them in a cool frame very near the glass, so as to keep them sturdy, and finally exposing them in the same position by taking the lights quite off. This course is perhaps the more desirable in the case of the variegated maize. In neither case should the plants be drawn up long in heat, as, if so, they will not thrive so well. The first few leaves the variegated kind makes are green, but they soon begin to manifest that striping which makes it as attractive as any variegated stove-plant we grow. _Cuzko_ and _Caragua_ are the largest and finest of the green varieties, and _gracillima_ the smallest and most graceful of all the varieties of maize. They should be planted out about the middle of May.

The variegated or Japanese maize is a very remarkable and handsome variety, found by Mr. Hogg in Japan--that great country for variegated plants. Its beautiful variegation is reproduced true from seed, and it is almost an indispensable plant in the flower-garden, not growing so vigorously as the green kinds. It is particularly useful for intermingling with arrangements of ordinary bedding-plants, for vases, the outer margins of beds of subtropical plants, and like positions, where its variegation may be well seen, and where its graceful leaves will prove effective among subjects of dumpy habit. It should in all cases have light, rich, warm soil. It has a habit of breaking into shoots rather freely near the base of the central stem; and where it grows very freely, this should recommend it for planting in an isolated manner, or in groups of three or five, on the turf.