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FNA | Family List | FNA Vol. 20 | Asteraceae | Pyrrocoma

3b. Pyrrocoma clementis Rydberg var. villosa (Rydberg) Mayes ex G. K. Brown & D. J. Keil, Phytologia. 73: 57. 1992.

Pyrrocoma villosa Rydberg, Bull. Torrey Bot. Club 27: 625. 1900

Plants 10–15 cm. Stems ascending. Leaves oblanceolate, 70–100 × 10–15 mm, margins entire or slightly denticulate. Involucres ca. 20 mm wide. Phyllaries narrowly lanceolate, apices attenuate. Cypsela faces glabrous.

Flowering Jul–Aug. Openings in pine forest, above timberline in alpine meadows; of conservation concern; 2700–3500 m; Wyo.

Variety villosa is recognized mainly by its glabrous cypselae, lanceolate phyllaries, and geographic isolation. It is known primarily from the Big Horn Mountains in north-central Wyoming. The affinities of this poorly known taxon are obscure. It has been considered a distinct species or related to Pyrrocoma uniflora or P. integrifolia.


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