This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Perennial herbs, with mostly tufted stems. Leaves alternate: blades very narrow and elongated. Cymes umbel-like, solitary at the ends of long peduncles, and subtended by very small bracts wholly unlike the leaves. Sepals 3. Petals 3, reddish, pink or rose-purple, distinct. Stamens 6: filaments pubescent. Capsule loculicidally 3-valvjed. Seed with a rough testa. [In honor of A. Cuthbert, of Augusta, Georgia, a diligent student of the southern flora.]
Tradescantia rosea Chapm. Fl. S. U. S. 498. 1860.
Not Vent. 1800. C. graminea Small, Fl. SE. U. S. 237. 1903.
Stems erect, 2'-8' tall, densely tufted, sometimes 100 or more together, commonly simple, slightly zigzag. Leaves quite numerous; blades narrowly linear or linear-filiform, 4'-6' long, or shorter above, mostly ¥'-\¥' broad, acute, mostly erect; sheaths ciliate: peduncles sometimes overtopping the leaves: cymes 3-15-flowered, simple: pedicels slightly thickened at the apex, becoming about 5" long: sepals oblong-ovate or ovate, 2"-2i" long, glabrous: corollas pink or rose-colored, 5"-10" broad: capsules subglobose, about 1 1/2" in diameter.