Comprehensive Description
provided by North American Flora
Tetraneuris arizonica Greene, Pittonia 3 : 266. 1898
Tetraneuris pilosa Greene; Rydb. Fl. Colo. 378. 1906.
An acaulescent cespitose-pulvinate perennial; branches of the caudex densely covered by remnants of old leaves and copious long hairs at first white, in age brown; leaves densely clustered, linear-oblanceolate, 3-6 cm. long, 2-5 mm. (seldom 6 mm.) wide, sparingly longsilky, in age glabrate; scape 5-15 cm. (rarely 15-20 cm.) long, more or less silky-pilose; involucre 7-8 mm. high, 12-15 mm. broad, more or less densely villous; bracts oval or elliptic, obtuse, often tinged with red on the margins; ligules about 10 mm. long, 5-6 mm. wide; disk-corollas 4 mm. long; tube very short; achenes densely hirsute, 3-3.5 mm. long; squamellae broadly obovate, 2 mm. long, abruptly contracted into an awn.
Type locality: Treadwell, Arizona.
Distribution: Colorado and New Mexico to Nevada and Arizona.
- bibliographic citation
- Per Axel Rydberg. 1915. (CARDUALES); CARDUACEAE; HELENIEAE, TAGETEAE. North American flora. vol 34(2). New York Botanical Garden, New York, NY
