Among the numerous family of Coreopsis, are included a number of showy perennials, with yellow flowers, all perfectly hardy, and easily propagated by division of the roots.
Coreopsis lanceolata, - Lance-leaved, - is a fine species, with lanceolate leaves, producing a profusion of large, rich, yellow flowers, upon long peduncles, (flower-stems,) which begin to open in June, and give a continued succession until autumn. Height about two feet. This is almost the only perennial which produces yellow compound flowers, so early in summer. A small root, planted in April, will make a large plant by autumn. All the species are propagated by dividing the roots. They flourish in moist soils, but I have found them most luxuriant in a deep, black loam, inclining to moisture. In flower most of the summer.
Coreopsis verticillata. - Leaves verticillate (given off in a rircle round the stern); opposite, sessile (without footstalks); ternate (in threes); or quinite (in fives); leaflets linear lanceolate, entire; rays of the flower acute, pale yellow; disk, or centre, dark brown. The flowers have a peculiar, star-shaped appearance. It is said the florets are used to dye cloth red. It is a handsome shrubbery or border plant, continuing from July to October in bloom.
Coreopsis tenuifolia. - Slender-leaved. - The foliage of this species very much resembles the last, with this difference, it is much more delicate and finer. The flowers are of the same shape, a deep, shining yellow, having its disk also yellow; not more than a foot high; in bloom in July and August. A hand-some plant, suitable for the front of the border.
Coreopsis tripteris. - Three-leaved. - A tall, handsome plant, suitable for the shrubbery, six feet high. Leaves on the stems in threes; lanceolate, entire; radical ones pinnate; flowers yellow; from August to October.
Coreopsis grandiflora. - Great-flowered. - The flowers are not so large, however, as C. lanceolata, nor so handsome. Its habits are different from the other species, having creeping roots, which throw up, in every direction, stems not more than one foot high, with compound, much divided leaves; leaflets linear. As an exception to the other species, this is somewhat tender, and requires protection.
There were as many as thirty species formerly included in this genus, all of which are more or less ornamental, and suitable for the shrubbery or border. Latterly, some of the species have been distributed among the genus Actinomeris, Simsia, and Calliopsis. In the last, C. tinctoria is now arranged.