Comprehensive Description
provided by North American Flora
Oreoxis humilis Raf. Bull. Bot. Seringe, 1: 217. 1830
Cymoplerus humilis Tidestrom in Tidestrom & Kittell, Fl. Ariz. N. Mex. 325. 1941.
Plants 2-15 cm. high, the base of the umbel and the inflorescence occasionally puberulent; leaves oblong in general outline, excluding the petioles 5-45 mm. long, 5-10 mm. broad, 1-2pinnate, the ultimate divisions mostly distinct, 2-10 mm. long, 1-2 mm. broad; petioles 1-4.5 cm. long; peduncles 1-13 cm. long; involucre rarely of an inconspicuous linear bract; involucel dimidiate, the bractlets linear, 3-5 mm. long; rays 3-9, 2-5 mm. long; flowers yellow; fruit oblong, somewhat boat-shaped, 3-5 mm. long, 1.5-3 mm. broad, glabrous, the wings broadly linear, usually rounded at the apex in cross section, the lateral broader than the dorsal; oil-tubes 1-3, usually 3, in the intervals, 3-6 on the commissure.
Type locality: Rocky Mountains. Colorado, James.
Distribution: Alpine, region of Pikes Peak, Colorado {Clements &* Clements 435, Letlerman 177).
- bibliographic citation
- Albert Charles Smith, Mildred Esther Mathias, Lincoln Constance, Harold William Rickett. 1944-1945. UMBELLALES and CORNALES. North American flora. vol 28B. New York Botanical Garden, New York, NY
