Macromeria
(from makros, large, and meris, a part; the flowers of this genus are the largest in the whole family). ORD. Boragineae. A genus comprising about eight species of half-hardy perennial herbs, natives of Mexico, Columbia, and Peru, allied to Onosmodium and Lithospermum, from the latter of which it is distinguished by the exserted stamens, and by having the corolla with a long tube, dilated at the throat. Racemes terminal, few-flowered, bracteate. Leaves alternate, sessile, lanceolate. M. exseta is probably the only species yet introduced. For culture, see Lithospermum. M. exserta (exserted). fl. yellow, racemose; style and stamens much exserted. Autumn. l. lanceolate, mucronate, scabrous. h. 3ft. Mexico, 1846. (B. R. 1847, 26.)