Comprehensive Description
provided by North American Flora
Spermolepis echinata (Nutt.) A. Heller, Contr. Herb. Frankl. & Marsh. 1: 73. 1895.
Leptocaulis echinatus Nutt.; DC. Coll. Mem. 5: 39. 1829 (nomen nudum); Prodr. 4: 107. 1830. Apium echinatum Benth. & Hook.; S. Wats. Bibl. Ind. 412. 1878. Low and often spreading, 0.5-4 dm. high; leaves ovate in general outline, excluding the petioles 7-25 mm. long, 7-20 mm. broad, ternately decompound, the ultimate divisions filiform, mucronulate, 2— IS mm. long, 0.5-1 mm. broad; petioles 3-20 mm. long; peduncles 8-65 mm. long; involucel of a few filiform bractlets, calloustoothed to glabrous, shorter than the pedicels; rays 5-14, suberect, unequal, 1-15 mm. long; pedicels 1-6, up to 7 mm. long, the central umbellets 1-flowered, sessile; fruit ovoid, 1.5-2 mm. long, 1.5-2 mm. broad, covered with short echinate bristles.
Type locality: "In Amer. Bor. ad Red River," Arkansas, Nuttall.
Distribution: Missouri to Louisiana, west to Arizona, Sonora, and Coahuila (Heller 1561,
- 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
