Erigeron wilkenii O'Kane
Family: Asteraceae
Erigeron wilkenii image
Perennials, 10-20 cm (occurring mostly singly); taprooted, caudices simple or branches relatively slender. Stems erect, sparsely strigillose (hairs white, stiff), eglandular. Leaves mostly basal (persistent); (gray-green) blades narrowly oblanceolate to subspatulate, 9-62 × 1-5 mm, cauline linear-bractlike (bases enlarged, purplish-membranous), margins entire, faces sparsely and closely strigose, eglandular. Heads 1. Involucres 3.4-4.6 × 6-8.5 mm. Phyllaries in 2-3 series, sparsely hirsute, minutely glandular. Ray florets (8-)11-12; corollas adaxially white, abaxially light pink, 4.5-6 mm, laminae not coiling or reflexing. Disc corollas 2.2-3.5 mm. Cypselae ca. 1.8 mm, 2-nerved, faces sparsely strigose; pappi: outer apparently 0, inner of (12-)20-30 bristles. Flowering May-Jun. Sloping alluvium and colluvium at w-facing bases of sheer sandstone walls; of conservation concern; 1500-2300 m; Colo. Erigeron wilkenii is known only from Pool Canyon in Dinosaur National Monument.