This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(Greek for blue flower). Cam-panulacese. Ten or a dozen herbs, probably mostly perennial, of the high mts. of Cent, and E. Asia, with showy blue flowers terminating the ascending mostly simple hairy stems: corolla funnelform, tubular or bell-shaped, 5-lobed; stamens free from the corolla, the ovate anthers more or less connate around the pistil: fruit a caps, with persistent calyx, loculicidally 3-5-valved: leaves alternate, usually small, entire or somewhat lobed. C. lobatus, Wall., may be expected in collections of choice alpines: 4-5 in.: leaves small, narrowing to base, tooth-lobed at summit: flowers bright blue, 1 in. diam., resembling a shining periwinkle flower, funnelform with reflexed lobes, the corolla exceeding the calyx-tube and hairy in the throat. B.M. 6485. Other species mentioned in recent horticultural literature are C. microphallus, Edgew. (C. linifolius, Wall.), with slender wiry stems, small entire leaves, and flowers like those of C. lobatus but .with very hairy throat and longer narrower segments; C. incanus, Hook. f. & Thorns., with numerous wiry stems, small nearly sessile leaves, and yellow campanulate flowers with hairy calyx; the W. China form of this (variety leiocalyx) has a less hairy calyx; C. Hodkeri, Clarke, is an annual with small stalked leaves and blue flowers, from China and India; has rigid stems with short lateral flower-branches. l, H. B.