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

12a. Pyrrocoma racemosa (Nuttall) Torrey & A. Gray var. congesta (Greene) Mayes ex G. K. Brown & D. J. Keil, Phytologia. 73: 58. 1992.

Pyrrocoma congesta Greene, Pittonia 3: 23. 1896; Haplopappus racemosus (Nuttall) Torrey subsp. congestus (Greene) H. M. Hall

Plants 20–60 cm. Stems glabrous or sparsely tomentulose. Leaves: basal blades lanceolate to elliptic, 100–200 × 8–30 mm, thin and ± membranous when dry, margins entire or sparsely denticulate, faces usually glabrous. Heads sessile or nearly so, crowded, in glomerate-spiciform arrays. Involucres campanulate, 7–9 × 12–16 mm. Phyllaries yellowish green, margins ciliate, apices erect, abruptly narrowed, acute, faces sparsely tomentose at least proximally. Cypsela faces sericeous.

Flowering Jul–Sep. Coniferous forest openings, chaparral, bogs; 200–1000 m; Calif., Oreg.

Variety congesta is recognized by its slender stems, heads in congested glomerate-spiciform arrays, and yellowish green phyllaries.


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