Part 20

The stems, furnished with fruit of good colour, but otherwise bare, make capital decorations for indoors, when mixed with tall grasses, either fresh or dried, and for such purposes this plant is worth growing; any kind of soil will do, in an out-of-the-way part, but if in shade, the rich colour will be wanting.

Flowering period, June to frosts.

Podophyllum Peltatum.

DUCK'S-FOOT, _sometimes called_ MAY APPLE; _Nat. Ord._ PODOPHYLLACEÆ.

A hardy herbaceous perennial from North America, more or less grown in English gardens since 1664. As may be seen from the illustration (Fig. 75), it is an ornamental plant, and though its flowers are interesting, they are neither showy nor conspicuous, as, from the peculiar manner in which they are produced, they are all but invisible until sought out. Its leaves and berries constitute the more ornamental parts of the plant.

The flowers are white, not unlike the small white dog-rose in both size and form; the calyx is of three leaves, which fall off; the corolla, of six to nine petals; peduncle nearly an inch long, which joins the stem at the junction of the two leaf stalks, only one flower being produced on a stem or plant. The leaves join the rather tall and naked stem by stalks, 2in. to 3in. long; they are handsome in both form and habit. As the specific name implies, the leaves are peltate or umbrella-shaped, deeply lobed, each lobe being deeply cut, and all unevenly toothed and hairy at the edges, with a fine down covering the under sides; the upper surface is of a lively, shining green colour, and finely veined. The flower is succeeded by a large one-celled ovate berry, in size and form something like a damson, but the colour is yellow when ripe, at which stage the berry becomes more conspicuous than the flower could be, from the manner in which the young leaves were held.

We want cheerful-looking plants for the bare parts under trees, and this is a suitable one, provided the surface soil has a good proportion of vegetable matter amongst it, and is rather moist. The thick horizontal roots creep near the surface, so it will be seen how important it is to secure them against drought otherwise than by depth of covering; a moist and shady position, then, is indispensable. In company with trilliums, hellebores, anemones, and ferns, this graceful plant would beautifully associate. Another way to grow it is in pots, when exactly the required kind of compost can easily be given, viz., peat and chopped sphagnum. Thus potted, plunged in wet sand, and placed in a northern aspect, it will be found not only to thrive well, as several specimens have done with me, but also to be worth all the trouble. To propagate it, the long creeping roots should be cut in lengths of several inches, and to a good bud or crown. When so cut in the autumn, I have proved them to rot when planted, but others buried in sand until February, and then planted, have done well.

Flowering period, May and June.

Polyanthus.

_Nat. Ord._ PRIMULACEÆ.

This, with its numerous varieties, comes under _Primula veris_, or the common Cowslip. The improved varieties which have sprung from this native beauty of our meadows and hedgerows are innumerable, and include the rich "gold-laced" kinds--which are cared for like children and are annually placed on the exhibition tables--as well as the homely kinds, which grow in the open borders by the hundred. The Polyanthus is eminently a flower for English gardens; and this country is noted for the fine sorts here raised, our humid climate suiting the plant in every way; its flowers offer a variety of colour, an odour of the sweetest kind, full and rich, reminding us not only of spring time, but of youthful rambles and holidays.

As an "old-fashioned" flower for garden decoration it is effective and useful, from the great quantity of bloom it sends forth and the length of its flowering season; from its love of partial shade it may be planted almost anywhere. Its neat habit, too, fits it for scores of positions in which we should scarcely think of introducing less modest kinds; such nooks and corners of our gardens should be made to beam with these and kindred flowers, of which we never have too many. Plant them amongst bulbs, whose leaves die off early, and whose flowers will look all the happier for their company in spring; plant them under all sorts of trees, amongst the fruit bushes, and where only weeds have appeared, perhaps, for years; dig and plant the Polyanthus, and make the wilderness like Eden.

Flowering period, February to June.

Polygonum Brunonis.

KNOTWEED; _Nat. Ord._ POLYGONACEÆ.

This is a dwarf species from India, but quite hardy. It is pretty, interesting, and useful. The flowers are produced on erect stems a foot high, and formed in spikes 3in. to 5in. long, which are as soft as down and smell like heather. The colour is a soft rose. These flowers spring from a dense mass of rich foliage; the leaves in summer and early autumn are of a pleasing apple-green colour, smooth, oblong, and nearly spoon-shaped from the narrowing of the lower part; the mid-rib is prominent and nearly white; the leaf has rolled edges, and is somewhat reflexed at the point. Let the reader closely examine the leaves of this species while in their green state, holding them up to a strong light, and he will then behold the beauty and finish of Nature to a more than ordinary degree. This subject is one having the finest and most lasting of "autumnal tints," the dense bed of leaves turn to a rich brick-red, and, being persistent, they form a winter ornament in the border or on rockwork. The habit of the plant is creeping, rooting as it goes. It is a rampant grower, and sure to kill any dwarf subject that may be in its way.

It may be grown in any kind of soil, and almost in any position, but it loves sunshine. If its fine lambtail-shaped flowers are desired, it should be grown on the flat, but, for its grand red autumnal leaf tints, it should be on the upper parts of rockwork. It is self-propagating, as already hinted.

The flowers prove capital for dressing epergnes. I had not seen them so used, until the other day a lady visitor fancied a few spikes, and when I called at her house a day or two later saw them mixed with white flowers and late flowering forget-me-nots--they were charming.

Flowering period, August to the time of frosts.

Polygonum Cuspidatum.

CUSPID KNOTWEED; _Nat. Ord._ POLYGONACEÆ.

A recent introduction from China, perfectly hardy, shrub-like but herbaceous; a rampant grower, attaining the height of 6ft. or 7ft., and spreading fast by means of root suckers. During the early spring it pushes its fleshy shoots, and the coloured leaves, which are nearly red, are very pleasing; as they unfold they are seen to be richly veined, and are as handsome as the beautiful Fittonias, so much admired as hothouse plants.

The long slender stems grow apace, and when the growth has been completed the flowers issue from the axils of the leaves; they are in the form of drooping feathery panicles, 4in. to 5in. long, creamy white, and produced in clusters, lasting for three weeks or more in good condition. The leaves are 3in. to 4in. long, nearly heart-shaped but pointed, entire, and stalked, of good substance, and a pale green colour; they are alternately and beautifully arranged along the gracefully-arching stems. The specimens are attractive even when not in bloom. If the roots are allowed to run in their own way for two or three years they form a charming thicket, which must prove a pleasant feature in any large garden.

All through the summer its branches are used as dressings for large vases, and, either alone or with bold flowers, they prove most useful. In the shrubbery, where it can bend over the grass, from its distinct colour and graceful habit, it proves not only an effective but a convenient subject, as it allows the mowing machine to work without hindrance or damage. It is a capital plant for the small town garden. After sending to a friend several hampers of plants season after season, all without satisfactory results, owing to the exceptionally bad atmosphere of the neighbourhood, I sent him some of this, and it has proved suitable in every way.

Flowering period, July and August.

_P. c. compactum_ is a variety of the above. It is, however, very distinct in the way implied by its name, being more compact and rigid, and not more than half as tall. The leaves, too, are somewhat crimped, and of a much darker colour, the stems are nearly straight and ruddy, and the flowers are in more erect racemes, the colour yellowish-white. It forms a handsome bush, but is without the graceful habit of the type. Like the other knotweeds described, it enjoys a sandy loam, and requires nothing in the way of special culture. The roots may be transplanted or divided when the tops have withered.

Polygonum Filiformis Variegatum.

KNOTWEED; _Nat. Ord._ POLYGONACEÆ.

Very hardy and effective. I simply mention this as a foliage plant. The leaves are large, drooping, and finely splashed or marbled with pale green and yellow, in shape oval-oblong, being crimped between the veins. It is a scarce variety. Fine for the sub-tropical garden. Culture, the same as for all the Knotweeds.

Flowering period, late summer.

Polygonum Vaccinifolium.

VACCINIUM-LEAVED KNOTWEED; _Nat. Ord._ POLYGONACEÆ.

It may seem odd that we should go into the Dock family for plants and flowers for our gardens; still we may, and find some truly beautiful species. The above-named is a charming alpine, coming from the Himalayas, and proves perfectly hardy in our climate; it is seldom met with and cannot be generally known, otherwise it would be more patronised; it forms a pretty dwarf shrub, with woody slender stems, clothed with small shining foliage.

The flowers are very small, resembling those of the smaller ericas, and of a fine rosy colour; the unopened ones are even more pretty, having a coral-like effect; they are arranged in neat spikes, about 2in. long, and tapering to a fine point; they are numerously produced all along the procumbent branches, becoming erect therefrom. As the specific name denotes, the leaves are Vaccinium-like--_i.e._, small and oval, like box, but not so stout; they are closely set on the stems, are of a pale shining green, and somewhat bent or rolled. The habit is exceedingly neat, and, when in flower, a good specimen is a pleasing object; it is only a few inches high, but spreads quickly.

On rockwork it seems quite at home. My example has shade from the mid-day sun, and, without saying that it should have shade, I may safely say that it does well with it. The plant will thrive in sandy loam and is readily increased by putting small stones on the trailing stems, which soon root.

The leafy stems, with their coral-like, miniature spires, are useful in a cut state, so pretty, in fact, that it does not require any skill to "bring them in."

Flowering period, August to the frosts.

Potentilla Fruticosa.

SHRUBBY CINQUEFOIL; _Nat. Ord._ ROSACEÆ.

In mountainous woods this native deciduous shrub is found wild, and it is much grown in gardens, where it not only proves very attractive, but from its dwarf habit and flowering throughout the summer and autumn months, it helps to keep the borders or rock garden cheerful.

The flowers, which are lemon yellow, are in form like those of its relative, the strawberry, but smaller; they are produced in terminal small bunches, but seldom are more than two or three open at the same time, and more often only one; but from the numerous branchlets, all of which produce bloom, there seems to be no lack of colour. In gardens it grows somewhat taller than in its wild state, and if well exposed to the sun it is more floriferous, and the individual flowers larger.

It attains the height of 2ft. 6in.; the flowers are 1in. across; the petals apart; calyx and bracteæ united; ten parted; each flower has a short and slender stalk. The leaves are 2in. or more in length, pinnate, five but oftener seven parted, the leaflets being oblong, pointed, entire and downy; the leaf stalks are very slender, and hardly an inch long; they spring from the woody stems or branches, which are of a ruddy colour, and also downy. The habit of the shrub is densely bushy, and the foliage has a greyish green colour from its downiness.

This subject may be planted in any part of the garden where a constant blooming and cheerful yellow flower is required; it is pretty but not showy; its best quality, perhaps, is its neatness. It enjoys a vegetable soil well drained, and propagates itself by its creeping roots, which push up shoots or suckers at short spaces from the parent stock.

Flowering period, summer to early frosts.

Pratia Repens.

_Syn._ LOBELIA PRATIANA; CREEPING PRATIA; _sometimes called_ LOBELIA REPENS; _Nat. Ord._ LOBELIACEÆ.

In October this small creeper is a very pretty object on rockwork, when the earlier bloom has become changed into oval fruit-pods. These berry-like capsules are large for so small a plant, and of a bright and pleasing colour. These, together with the few flowers that linger, backed up, as they are, with a dense bed of foliage, interlaced with its numerous filiform stems, present this subject in its most interesting and, perhaps, its prettiest form.

The flowers may be called white, but they have a violet tint, and are over half-an-inch in length. The calyx is adnate in relation to the ovarium, limb very short, but free and five-toothed; the corolla is funnel-shaped, but split at the back, causing it to appear one-sided. The solitary flowers are produced on rather long stems from the axils of the leaves. As they fade the calyces become fleshy and much enlarged, and resemble the fruit of the hawthorn when ripe. The leaves are distantly arranged on the creeping stems, ½in. long, oval, roundly toothed and undulated, fleshy, somewhat glaucous and petiolate. The habit of the plant is to root as it creeps, and the thread-like stems intersect each other in a pleasing way. They are to be seen distinctly, as the leaves are not only small, but distant, and seem to rest on a lattice-work of stems. This species comes from the Falkland Islands, and is of recent introduction.

It is herbaceous and perennial, and proves hardy in this climate if planted on a well-drained soil of a vegetable character. It not only enjoys such a position as the slope of rockwork, but, when so placed, it may be seen to advantage. It should be free from shade, or the fruit will not colour well. It will therefore be seen that this is a rock plant, so far as its decorative qualities are concerned. It may, however, be grown well on flat beds of peat soil, where its fruit will mature finely, but it cannot be so well seen. It is self-propagating. Transplantings should be made in spring, or tufts may be placed in pots, during the autumn, and put in cold frames, as then they would not suffer displacement by frosts.

Flowering period, June to frosts.

Primula Acaulis.

_Syn._ P. VULGARIS, COMMON PRIMROSE; _Nat. Ord._ PRIMULACEÆ.

This common native flower needs no description, growing everywhere, yet we all seem to enjoy its company in our gardens, though it may, perhaps, be seen wild close by. It is a flower of more interest than ordinary, and to the florist of some importance. The great variety of double and single primroses have all sprung from this, the modest form found in our woods and damp hedgerows, and the number is being added to year by year. The generic name is in allusion to a quality--that of early or first flowering. The specific name, _acaulis_, is in reference to its stemlessness, which is its main distinguishing feature from the Polyanthus and Oxlip (_P. veris_). I may add, that from the great variety of _P. acaulis_ and _P. veris_, and their mutual resemblance in many instances, the casual observer may often find in this feature a ready means by which to identify a specimen. Of course, there are other points by which the different species can be recognised, even when the scape is out of sight, but I am now speaking of their general likeness to each other in early spring.

Common Cowslips or Paigles (_P. veris_), great Cowslips or Oxlips (_P. elatior_), field primrose or large-flowered primrose (_P. acaulis_), were all in olden times called by the general name of primrose, the literal meaning of which is first-rose. Old authorities give us many synonymous names for this plant, as _P. grandiflora_, _P. vulgaris_, _P. sylvestris_, and _P. veris_. The last is given by three authorities, including Linnæus. As this seems to clash hard with the name as applied to the Cowslip species, I may at once state that Linnæus has only that one name for the three species, viz: _P. acaulis_, _P. elatior_, _P. veris_; the name _P. vulgaris_, by another authority, is explained by the same rule; Curtis (_Flora Londinensis_) is the authority for the name _P. acaulis_.

I need not here go into any of the varieties, beyond giving a cursory glance at them as a whole. The double kinds are all beautiful, some superb and rare, as the ruby and crimson; the white, sulphur, mauve, magenta, and other less distinct double forms are more easily grown, and in some parts are very plentiful. The single kinds have even a more extensive range in colour. We have now fine reds and what are called blue primrose; the latter variety is not a blue, but certainly a near approach to it. It is an interesting occupation to raise the coloured primroses from seed, not only because of the pleasing kinds which may be so obtained, but under cultivation, as in a wild state, seedlings are always seen to be the more vigorous plants; self-sown seed springs up freely on short grass, sandy walks, and in half-shaded borders; but when it is sought to improve the strain, not only should seedlings be regularly raised, but it should be done systematically, when it will be necessary, during the blooming season, to look over the flowers daily and remove inferior kinds as soon as proved, so that neither their seed nor pollen can escape and be disseminated. This part of the operation alone will, in a few years, where strictly carried out, cause a garden to become famous for its primroses. Seasonable sowing, protection from slugs, and liberal treatment are also of the utmost importance.

Briefly stated, the _modus operandi_ should be as follows: Sow the seed at the natural season, soon as ripe, on moist vegetable soil; do not cover it with more than a mere dash of sand; the aspect should be north, but with a little shade any other will do; the seedlings will be pretty strong by the time of the early frosts; about that time they should, on dry days, have three or four slight dressings of soot and quicklime; it should be dusted over them with a "dredge" or sieve; this may be expected to clear them of the slug pest, after which a dressing of sand and half-rotten leaves may be scattered over them; this will not only keep them fresh and plump during winter, but also protect them from the effects of wet succeeded by frost, which often lifts such things entirely out of the earth. In March, plant out in well enriched loam, in shady quarters; many will flower in late spring. Another plan would be to leave them in the seed bed if not too rank, where most would flower; in either case, the seed bed might be left furnished with undisturbed seedlings. The main crop of bloom should not be looked for until the second spring after the summer sowing.

The double forms are not only less vigorous, but the means of propagation are limited; offsets of only healthy stock should be taken in early summer. A rich retentive loam suits them, or moist vegetable soil would do: shade, however, is the great desideratum; exposure to full sunshine harms them, even if well moistened at the roots; besides, in such positions red spider is sure to attack them. This mode of propagation is applicable to desirable single varieties, as they cannot be relied upon to produce stock true to themselves from seed. In planting offsets it is a good practice to put them in rather deeply; not only are the new roots emitted from above the old ones, but the heart of the offset seems to be sustained during the warm and, perhaps, dry weather, by being set a trifle below the surface. This I have ever proved to be a sure and quick method in the open garden.

Flowering period, February to June.

Primula Capitata.

ROUND-HEADED PRIMULA; _Nat. Ord._ PRIMULACEÆ.

Hardy, herbaceous, and perennial. Before referring to this Primula in particular, I would say a word or two respecting hardy and alpine Primulæ in general. It may appear strange and, on my part, somewhat presumptuous, when I state that this section of the Primula family is little known. Gardeners, both old and young, who have seen them in collections, have asked what they were as they stood over them admiring their lovely flowers. They are, however, very distinct on the one hand from the primrose (_Primula vulgaris_ or _acaulis_) and polyanthus (_Primula elatior_) sections; and also from the _P. sinensis_ section--the species with so many fine double and single varieties, much grown in our greenhouses, and which, of course, are not hardy. The hardy and distinct species to which I now allude are mostly from alpine habitats, of stunted but neat forms, widely distinct, and very beautiful.

The British representatives of this class are _Primula farinosa_ and _P. Scotica_, but from nearly all parts of the temperate zone these lovely subjects have been imported. It may not be out of place to name some of them: _P. Allioni_, France; _P. amoena_, Caucasus; _P. auricula_, Switzerland; _P. Carniolica_, Carniola; _P. decora_, South Europe; _P. glaucescens_ and _P. grandis_, Switzerland; _P. glutinosa_, South Europe; _P. latifolia_, Pyrenees; _P. longifolia_, Levant; _P. marginata_, Switzerland; _P. minima_, South Europe; _P. nivalis_, Dahuria; _P. villosa_, Switzerland; _P. viscosa_, Piedmont; _P. Wulfeniana_, _P. spectabilis_, _P. denticulata_, _P. luteola_, _P. Tirolensis_, and others, from the Himalayas and North America, all of which I have proved to be of easy culture, either on rockwork, or in pots and cold frames, where, though they may be frozen as hard as the stones amongst which their roots delight to run, they are perfectly safe. The treatment they will not endure is a confined atmosphere.

_P. capitata_, which is a native of Sikkim, is still considered to be new in this country, though it was flowered at Kew about thirty years ago, but it has only become general in its distribution during the past three or four years.

The flowers are borne on stems which are very mealy, and 6in. to 9in. high; the head of bloom is round and dense, 1½in. across. The outer pips are first developed, and as they fade the succeeding rings or tiers extend and hide them. The very smallest in the centre of the head remain covered with the farina-like substance, and form a beautiful contrast to the deep violet-blue of the opened, and the lavender-blue of the unopened pips. One head of bloom will last fully four weeks. The denseness and form of the head, combined with the fine colour of the bloom, are the chief points which go to make this Primula very distinct. The leaves, which are arranged in rosette form, are otherwise very pretty, having a mealy covering on the under side, sometimes of a golden hue; they are also finely wrinkled and toothed, giving the appearance, in small plants, of a rosette of green feathers. Sometimes the leaves are as large as a full-grown polyanthus leaf, whilst other plants, which have flowered equally well, have not produced foliage larger than that of primroses, when having their earliest flowers.