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Showy Harebell; Nat. Ord. Campanulaceæ.
A comparatively new species, brought from Siberia in 1825, and sometimes called C. glomerata dahurica. It is a good hardy plant, perennial and herbaceous, and one of the earliest to flower. It has a distinct appearance; it nearly resembles C. aggregata, but the latter does not flower until several weeks later. Apart from its likeness to other species of the genus, it is a first-class border flower, having large bells of a fine deep purple colour, and, unlike many of the Harebells, is not over tall, but usually about a foot high, having a neat habit. The flowers are arranged in dense heads, whorl fashion, having very short stalks; they are nearly 2in. long and bell shaped. The leaves (radical) are oval heart-shaped and stalked; those of the stems are sessile; the whole plant is hairy and robust. This is one of the flowers which can hardly be planted out of place in any garden, excepting amongst the rare and very dwarf alpines; it is not only true to its name, "showy," but handsome. It will grow and flower well in the worst soil and needs no sort of care; it would be fine in lines by a shrubbery, and is effective in bold clumps; and though a new kind, it belongs to a race of "old-fashioned" flowers, amongst which it would mix appropriately. Increased by division in autumn.
Flowering period, June and July.
Campanula Waldsteiniana.
Nat. Ord. Campanulaceæ.
A rare and distinct alpine species from Carinthia. It proves perfectly hardy in this climate. For the rock garden it is a gem of the first water, its habit being dwarf, dense, and rigid; floriferous as many of the Bellflowers are, I know none to excel this one. As may be observed in the following description, there are not a few distinctive traits about it, which, more or less, go to make it a desirable subject for rare and choice collections.
The flowers are a glistening bluish-lilac, erect, and ¾in. across when fully expanded. The corolla can hardly be said to be bell-shaped, as the five divisions are two-thirds of its depth, which allows it, when full blown, to become nearly flat, and as the segments are equal, sharply cut, and pointed, the flower has a star-like appearance. The little calyx is cup-shaped, angular, and has small, stout, horn-like segments, which are bent downwards. Each flower has a pedicel about 1in. long, which springs from the axils of the main stem leaves; the stems seldom exceed the height of 4in. or 5in., and they are exceedingly fine, thready, as also are the pedicels; they are, moreover, of zigzag form, from node to node. The leaves are ¾in. long, and less than ½in. wide, ovate or nearly cordate, partially folded, and sometimes reflexed at the ends, nearly stalkless, slightly toothed, smooth, of good substance and a peculiar grey-green colour. The foliage for two or three weeks is completely hidden by the large number of flowers, during which time it is a most attractive subject.
I grow it with other dwarf Campanulas in a collection bed, where it compares well with the finest, such as C. pulla, C. muralis, and C. Zoysii, for effectiveness. Having proved it to thrive well in light sandy soil of a vegetable character, I have not tried it otherwise; it enjoys a sunny situation. The site should be well drained; it will endure nothing like stagnant moisture—its peculiar roots would indicate this fact, they are not only tender and fleshy, but thick and of a pith-like nature, and, as I have never been able to gather any seed, and the propagation has to be carried out by root division, there requires to be a careful manipulation of these parts, for not only do they split and break with the least strain, but when so mutilated they are very liable to rot. I have found it by far the better plan to divide this plant after it has begun to grow in March or April, when its fine shining black shoots, which resemble horse hairs in appearance, are about ½in. high. Slugs are fond of this plant; a dressing once a week of sand and soot, when it begins to grow, will keep them off.
Flowering period, July and August.
Centaurea Montana.
Mountain Knapweed; Nat. Ord. Compositæ.
This is an "old-fashioned" and favourite flower. Every one must be familiar with its thistle-like formed flowers; it is sometimes called the large or perennial Cornflower and also the Large Bluebottle. The blue variety has been grown in English gardens since 1596. There are now white and pink coloured varieties, all rampant growers, very hardy and perennial. They are in every way superior to the annual kind, which is so largely grown, the flowers being more than twice the size, and produced two months earlier; the blooming period is maintained until late autumn.
The flowers, as before hinted, are thistle-shaped; the pericline or knob just under the florets is cone-shaped, covered with evenly set and pointed scales, green, edged with a brown margin, set round with short bristle-like teeth. The florets of the outer ring are 1½in. long, tubular half their length, the wider portion being five to seven cut; the centre florets are short and irregular, richly tinted with pink at their bases; the whole flower or ray, when expanded, is 3in. across. They are produced on stems over 2ft. long and of a somewhat procumbent habit, angular and branched near the tops; the leaves are 3in. to 6in. long, lance-shaped, entire and decurrent, giving the stems a winged appearance. They are of a greyish colour—nappy—whence the name Knapweed.
This vigorous species, with its white and pink varieties, may be grown in any kind of soil. It requires plenty of room; a two-year-old plant will form a specimen a yard in diameter under favourable conditions. The effect is good when all the three colours are grown near each other in bold pieces. They yield an unfailing supply of flowers, which are of a very useful type; in fact, the more they are cut the more they seem to bloom, and it is a good plan to cut short half the stems about June. They will (in a week or two) produce new shoots and large flowers in abundance, the gain being flowers of extra size during autumn.
Propagated by division of the roots any time.
Flowering period, June to September.
Centranthus Ruber.
Syn. Valeriana Ruber—Red Valerian; Nat. Ord. Valerianaceæ.
This is a strong and vigorous garden plant, with a somewhat shrubby appearance; it is herbaceous, perennial, and sometimes classed as a British species, therefore hardy; but though its classification among British plants is justifiable, it is only so on the ground of its being a naturalised subject, its original habitats being in the South of Europe. It is a favourite and "old-fashioned" flower, and it fully justifies the estimation in which it is held, the flowers being produced in large bunches of a fine rich colour, which are very durable. Its shrubby habit is not one of its least recommendations; seen at a distance—which it easily can be—it might be taken for a ruby-coloured rhododendron, to which, of course, it has no resemblance when closely inspected. It grows 2ft. high or more.
The flowers are a bright ruby colour, very small, but closely massed in great numbers, borne in corymbs, terminal and much branched; "the calyx-limb, at first revolute, afterwards expanded into a feather-like pappus;" the corolla is tubular, long, slender, and spurred; the segments or petals are small and uneven, both in form and arrangement; the germen is long; anther prominent and large for so small a flower, viz.,¾in. long and hardly ¼in. in diameter. The stems are stout, round, hollow, and glaucous; they are furnished with leaves of various shapes at the nodes, as lance-shaped, long oval, heart-shaped and plain, elliptical and pointed, wavy and notched, and arrow-shaped, lobed, and toothed. The root leaves are mostly ovate, lanceolate, and entire. The whole plant is smooth and glaucous. From the description given, it may readily be seen that when in flower it will be effective—massive heads of ruby flowers topping a shrub-like plant of shining foliage and glaucous hue. It