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, hound's tongue, from the shape and soft surface of the leaves of the commonest species). Borraginaceae. A widely dispersed genus of little horticultural interest, being mostly tall, coarse, weedy herbs. Leaves alternate: flowers always in elongated, often 1-sided racemes. - Species 75. C. officinale, Linn., Fig. 1190 (stick-tight), has a bur that becomes attached to clothing and to fleece of sheep. It is a biennial weed, naturalized from the Old World; grows about 2 ft. high in pastures and waste places of the Atlantic states, and has soft-pubescent, lanceolate leaves, and dull red-purple (sometimes white) flowers in pani-cled racemes. Root and herbage possess medicinal properties. C. grande, Douglas. Once cult, from Calif, as a hardy border perennial; grows about 2 ft. high, with lower leaves ovate - oblong, or somewhat heart-shaped at the base, acute or acuminate, 4-8 in. long, on margined petioles of about the same length: upper leaves smaller, ovate to lanceolate, abruptly contracted into shorter winged petioles: flowers violet or blue.
For C. appenninum, Linn., see Solenanthus. A new plant, C. furcatum, Wall., has recently been introduced It is a hairy herb, 1-3 ft. high, with large leaves and numerous blue flowers in clusters as in forget-me-not. India. Flowers in June. See page 3567.
Fig. 1190. Bur of Hound's tongue or stick-tig ht. (X I 1/2)
C. amabile, Stapf & Drummond. Allied to C. furcatum, but has larger flowers Perennial. S.W. China. N Taylor.†