Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette, near ground surface or slightly elevated on woody base, 1–3.8 dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.04–0.1 mm, sometimes mixed with stalked, 2-rayed ones, to 0.5 mm, usually sparsely pubescent distally.

blade narrowly oblanceolate, 1–4 mm wide, margins entire, ciliate along petiole, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.04–0.1 mm.

5–10, not concealing stem;

blade auricles 0.3–2 mm, surfaces of distalmost leaves usually sparsely pubescent.

10–20-flowered, usually unbranched.

ascending at anthesis;

sepals (purplish or greenish) glabrous or sparsely or moderately pubescent;

petals white or purple to lavender, 7–12 × 1.5–4 mm, glabrous;

pollen ellipsoid.

divaricate-ascending, straight, 5–20 mm, sparsely pubescent, trichomes appressed, branched.

divaricate-ascending, not appressed to rachis, not secund, straight or curved, edges parallel, 3.5–6.5(–7.5) cm × 1–1.6 mm;

valves glabrous;

ovules 30–72 per ovary;

style 0.1–1 mm.

uniseriate, 1–1.2 × 0.8–1 mm;

wing continuous, ca. 0.1 mm wide.

white;

sepals greenish, usually glabrous, rarely sparsely pubescent.