Onosmodium
(so called from its similarity to Onosma). SYNS. Osmodium, Purshia (of Sprengel). ORD. Boragineae. A small genus (about six species) of hardy, erect, herbaceous perennials, closely allied to Onosma, natives of North America and Mexico. Flowers white, greenish, or yellowish, sub-sessile, in terminal, scorpioid cymes or racemes; corolla tubular, with five erect or connivent lobes. Leaves alternate. The two species here described are the only ones yet introduced. For culture, see Onosma.
O. carolinianum (Carolinian). fl. yellowish-white, nearly sessile; racemes short, revolute, terminal, drooping. Summer. l. ovate-lanceolate and oblong-lanceolate, acute. h. 1ft. United States, 1759.
O. virginianum (Virginian). fl. yellowish, often paniculate. Summer. l. narrowly oblong, or somewhat lanceolate, obtuse, three to five-ribbed. h. 1ft. United States, 1812. Plant clothed with short, appressed, bristly hairs.