Pyrrocoma insecticruris

Plants 25-60 cm. Stems 1-5, erect to curved-ascending, red-tinged, glabrous or sparsely tomentulose distally, eglandular. Leaves: basal petiolate, blades oblanceolate to elliptic, 100-300 × 10-50 mm, margins sharply serrate to undulate or entire, glabrous or villoso-ciliate on petioles and midribs; cauline short-petiolate to sessile, moderately reduced distally, bases clasping, margins ciliate, apices obtuse to acute, faces sparsely villous, eglandular. Heads 3-10 in narrow, elongate, racemiform arrays. Peduncles 1-8 cm. Involucres hemispheric, 10-18 × 15-28 mm. Phyllaries in 2-3 series, loose, green with whitish base, linear-lanceolate, 9-13 mm, subequal, margins entire, ciliate, faces villous proximally. Ray florets 15-23; corollas 8-15 mm. Disc florets 35-50; corollas 5-9 mm. Cypselae narrowly oblong, 4-angled, 3-6 mm, faces striate, densely sericeous; pappi tawny, 6.5-9.5 mm. 2n = 36.

Flowering Jul-Aug. Gravelly moist meadows, grassy shrubby flats; 1200-1700 m; Idaho.

Pyrrocoma insecticruris has been treated as a sub-species of P. integrifolia; it differs from that species in its villous, serrate leaves, long-pedunculate heads, loose, linear-lanceolate phyllaries, sericeous cypselae, westerly distribution, and 2n = 36 chromosome number (R. A. Mayes 1976).