Flora of North America species comparison

usually 2–5 per caudex branch, arising from margin of rosette near ground surface, (1–)1.5–4 dm, densely pubescent proximally, trichomes short-stalked, 5–8-rayed, 0.1–0.2 mm, moderately to sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 2.6–7.4(–10.2) dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.1–0.5 mm, sometimes mixed with 2- or 3-rayed ones, to 1 mm, usually sparsely pubescent distally, rarely glabrous.

blade narrowly oblanceolate, 1.5–3(–5) mm wide, margins entire, ciliate along petiole base, trichomes (simple), to 0.6 mm, surfaces densely pubescent, trichomes short-stalked, 5–8-rayed 0.1–0.2 mm.

blade oblanceolate, 3–8(–10) mm wide, margins entire or shallowly dentate, ciliate near petiole base, trichomes (simple), to 1 mm, surfaces moderately to densely pubescent, trichomes short-stalked, 4–8-rayed, 0.15–0.4 mm.

5–14, not concealing stem;

blade auricles 0.1–0.5 mm, surfaces of distalmost leaves pubescent.

22–72, concealing stem proximally;

blade auricles 1–4 mm, surfaces of distalmost leaves sparsely pubescent or glabrous.

10–30-flowered, usually unbranched.

25–112-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals usually white, 5–7 × 1–2 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals pubescent;

petals white to lavender, 6–8 × 1–1.5 mm, glabrous;

pollen spheroid.

ascending to divaricate-ascending, straight, 5–10 mm, pubescent, trichomes branched.

divaricate-descending, straight or gently curved, (10–)15–28 mm, usually sparsely pubescent, rarely glabrous, trichomes appressed, branched.

ascending to divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 3–5.5 cm × 0.9–1.2 mm;

valves glabrous;

ovules 56–84 per ovary;

style 0.1–0.5 mm.

pendent, not appressed to rachis, not secund, straight or gently curved, edges parallel, 4.5–6.5 cm × 1.5–3 mm;

valves glabrous;

ovules 100–136 per ovary;

style to 0.2 mm.

uniseriate, 0.8–1 × 0.6–0.9 mm;

wing continuous (rarely absent), to 0.1 mm wide.

biseriate or sub-biseriate, 1–1.4 × 0.9–1 mm;

wing continuous, 0.05–0.15 mm.

= 14.