Erigeron lassenianus

Perennials, 9-20(-35) cm; taprooted, caudices essentially simple. Stems ascending to decumbent or prostrate, loosely strigose to hirtellous (hairs appressed-ascending to spreading, even-width, basal cells inclined), usually minutely glandular distally. Leaves basal (usually persistent) and cauline; basal blades usually narrowly oblanceolate to linear, rarely narrowly spatulate, 50-120(-150) × 3-6(-9) mm, cauline blades relatively unreduced distally, margins entire, 1-3-nerved, faces sparsely to moderately hirtellous to pilose, often minutely glandular. Heads (1-)3-7. Involucres 4-5.5 × 6-10(-12) mm. Phyllaries in 2-3 series (commonly strongly keeled to nearly folded), moderately hirsuto-villous or villous, densely minutely glandular. Ray (pistillate) florets 12-36 or 0; corollas pink to lavender or white, 4.5-8 mm, laminae slightly coiling or not. Disc corollas 2.5-3.5 mm. Cypselae 1.5-2.3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 12-24 bristles.