Comprehensive Description
provided by North American Flora
Cymopterus planosus (Osterhout) Mathias, Brittonia 2: 245. 1936.
Aulospermum planosum Osterhout, Bull. Torrey Club 30: 236. 1903.
Plants subcaulescent with the development of a conspicuous pseudoscape, 10-30 cm. high, the mature pseudoscape 5-15 cm. long; leaves usually oblong in general outline, excluding the petioles 1-6 cm. long, 1-3 cm. broad, sometimes minutely roughened, bipinnate, somewhat fleshy, pallid, glaucescent, the leaflets remote, entire to pinnately lobed, the lobes acute, incurved, 1-4 mm. long, about 1 mm. broad, confluent; petioles 1-6 cm. long; peduncles exceeding the leaves, 4—17 cm. long; involucre wanting; involucel of several linear, acute bractlets, about equaling the flowers; fertile rays 3-4, spreading, 4-45 mm. long, slightly roughened; pedicels 2-3 mm. long; flowers purple; fruit oblong, 5-7 mm. long, 2-3 mm. broad, the wings narrow at the base, equaling or narrower than the body ; oil-tubes 3 or 4 in the intervals, about 6 on the commissure; seed-face deeply concave.
Type locality: "Along the Eagle River at Minturn," Eagle County, Colorado, Oslerhout 2572. Distribution: Northwestern Colorado (Oslerhout 2744, Pur pus 83).
- 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
