Flora of North America species comparison

usually 3–5 per caudex branch, arising from margin of rosette, elevated above ground surface on woody base, 1–2.5 dm, densely pubescent proximally, trichomes short-stalked, 2–4 (or 5)-rayed, 0.2–0.4 mm, moderately to sparsely pubescent distally.

1–3 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 1–2.5 dm, glabrous throughout.

blade oblanceolate, 3–5 mm wide, margins entire, ciliate proximally, trichomes (simple), to 0.6 mm, surfaces densely pubescent, trichomes short-stalked, 2–4 (or 5)-rayed, 0.15–0.4 mm.

blade narrowly oblanceolate, 1–3(–6) mm wide, margins usually entire, rarely apically few-toothed, not ciliate, surfaces sparsely pubescent, trichomes short-stalked, 4–8-rayed, 0.08–0.2 mm.

5–9, not concealing stem;

blade auricles 0.5–1 mm, surfaces of distalmost leaves sparsely to moderately pubescent.

4–8, not concealing stem;

blade auricles 1–2 mm, surfaces of distalmost leaves glabrous.

5–11-flowered, usually unbranched.

5–12(–18)-flowered, usually unbranched.

divaricate-ascending at anthesis;

sepals pubescent;

petals pale purple, 6–8 × 1.5–2 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals glabrous;

petals lavender to purple, 4–5.5 × 1–1.5 mm, glabrous;

pollen spheroid.

descending, straight to slightly recurved, 4–6 mm, pubescent, trichomes appressed, branched.

usually divaricate-ascending, rarely horizontal, straight, 2–5(–10) mm, glabrous.

(immature) pendent, not appressed to rachis, not secund, straight, edges parallel;

valves glabrous.

usually divaricate-ascending, rarely horizontal, not appressed to rachis, secund (often weakly so), straight, edges parallel, 3–5.5 cm × 1.5–2 mm;

valves glabrous;

ovules 42–54 per ovary;

style 0.05–0.1 mm.

not seen.

uniseriate, 1.1–1.5 × 0.9–1.3 mm;

wing continuous, 0.1–0.3 mm wide.