UW Burke Herbarium species comparison

Lowermost leaves oblanceolate, up to 4.5 cm. long and 1 cm. wide, the others progressively reduced upward.

Leaves numerous, broadly linear or the lower oblanceolate, 3-10 cm. long and 2-10 mm. wide.

Heads in several tight clusters, in a close inflorescence;

involucre 3.5-5 mm. high, woolly only at the base, its bracts translucent, light brown;

corollas all tubular, whitish, the outer slender and pistillate, the few inner coarser and perfect;

pappus of capillary bristles united at base.

Heads numerous in small, tight clusters, forming a broad, open inflorescence;

involucre 4-7 mm. high, the numerous imbricate bracts woolly only at the base, white to tan;

corollas all tubular, whitish, the outer slender and pistillate, the few inner coarser and perfect;

pappus of capillary bristles, distinct, falling separately.

Achenes small, nerveless.

Achenes small, nerveless.