Arnicastrum glandulosum Greenm.

Arnicastrum glandulosum Greenman, Proc. Am. Acad. 39: 115
1903.
Arnicastrum glandulosum vestilum Greenman, Proc. Am. Acad. 39: 115. 1903.
A perennial herb; stem about 3 dm. high, scabrous-puberulent below, glandular above, striate, at first simple, later dichotomously branched; leaves sessile, opposite, lanceolate, 5-8 cm. long, entire or slightly sinuate-denticulate, rather firm, with 5-7 almost parallel ribs, scabrous-puberulent on both sides; involucre hemispheric, about 1 cm. high and 1.5 cm. broad; bracts ovate, well imbricate, puberulent, with 3-5 faint veins; ligules 12-14 mm. long, 3-4 mm. wide, about 7-nerved; disk-corollas about 7 mm. long; achenes cuneate-oblanceolate ; pappus surpassing the corolla.
Type locality: Sierra Madre, Chihuahua. Distribution: Chihuahua and Durango.