Comprehensive Description
provided by North American Flora
Thymophylla puberula Rydberg, sp. nov
A puberulent perennial, suffruticose at the base; stems 1-2 dm. high, densely puberulent, much branched; leaves mostly 2-4 cm. long, opposite, densely puberulent, pinnatifid with filiform divisions; peduncles about 5 mm. long; involucre turbinate, puberulent, 5-6 mm. high, 7-8 mm. broad, with a few subulate, minute accessory bracts; principal bracts in two series, the inner with triangular tips and 1 -3 glands, the outer lanceolate with 3-5 glands and the free margins decurrent halfway down or more; ligules 4-5 mm. long, 2 mm. wide; disk-corollas 3 mm. long; tube shorter than the trumpet-shaped throat; achenes 3 mm. long, sparingly hispidulous on the angles; pappus double; inner 5 squamellae lanceolate, including the awn 3 mm. long, the outer 5 oblong, 1 mm. long.
Type collected in the valley of San Luis Potosi, 1877, Schaffner 328 (754) (herb. N. Y. Bot. Gard.).
Distribution: Texas to Chihuahua, San Luis Potosi, and Hidalgo.
- bibliographic citation
- Per Axel Rydberg. 1915. (CARDUALES); CARDUACEAE; HELENIEAE, TAGETEAE. North American flora. vol 34(2). New York Botanical Garden, New York, NY
