Rehmannia
(named in honour of Joseph Rehmann, a physician of St. Petersburgh, 1779-1831). ORD. Scrophularineae. A genus comprising only a couple of species of hardy, perennial herbs, natives of China and Japan. Flowers rather large, in the axils of the bracts or floral leaves, declinate or pendulous, disposed in terminal racemes; calyx ovoid-campanulate, five-fid at apex; corolla dark purplish or pale, intensely coloured at the throat; limb oblique, sub-bilabiate, with spreading lips. Leaves alternate, obovate or oblong, deeply toothed. One of the species has been introduced. It thrives in any ordinary soil, but, though hardy, it will succeed best in a cool greenhouse. Propagation may be effected by cuttings.
R. glutinosa (glutinous). fl. lower ones pedicellate; upper ones sessile; corolla wholly or partially of a dingy purple, lin. long April. l., radical ones opposite, but most of them alternate, very shortly stalked, 1in. to 3in. long, acute or obtuse, decreasing upwards. Stem 1ft. to 2ft. high, erect, and, as well as the calyx and under side of the leaves, often purplish. North China, 1835. (B. M. 3653, B. R. 1960, and F. d. S. 1134, under name of R. chinensis.)