Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (1.4–)3–11.2 dm, densely pubescent proximally, trichomes simple, 0.6–1.5 mm, mixed with stalked, 2- (or 3-)rayed ones, 0.2–0.4 mm, sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.5–2.5 dm, glabrous throughout.

blade oblanceolate, 3–10 mm wide, margins usually dentate, rarely entire, sometimes ciliate, trichomes (simple or branched), to 1 mm, surfaces densely pubescent, trichomes stalked, 2–5-rayed, 0.3–0.6 mm.

blade oblanceolate, 1.5–5 mm wide, margins entire, ciliate proximally, trichomes (simple), to 0.4 mm, and distally, trichomes short-stalked, 2 or 3 (or 4)-rayed, 0.15–0.4 mm, surfaces glabrous.

(8–)14–60, often concealing stem proximally;

blade auricles (1–)3–10 mm, surfaces of distalmost leaves glabrous or sparsely pubescent.

2–7, not concealing stem;

blade with auricles 0.2–1 mm, auricles rarely absent, surfaces of distalmost leaves glabrous.

17–60-flowered, usually unbranched.

2–9-flowered, unbranched.

divaricate at anthesis;

sepals pubescent;

petals lavender to whitish, 5–8 × 1–2 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals lavender to purplish, 5–6 × 1–2 mm, glabrous;

pollen spheroid.

horizontal to divaricate-descending, usually straight, rarely slightly recurved, 4–13 mm, pubescent, trichomes spreading, 2- or 3-rayed.

ascending to suberect, straight, 6–20 mm, glabrous.

horizontal, divaricate-descending or widely pendent, not appressed to rachis, not secund, curved, edges parallel, 5.5–10.5 cm × 1.5–2.2 mm;

valves glabrous;

ovules 80–162 per ovary;

style 0.05–0.5 mm.

ascending to suberect, rarely appressed to rachis, not secund, straight, edges slightly undulate (rarely parallel), 3.5–5 cm × 3–5 mm;

valves glabrous;

ovules 18–30 per ovary;

style 0.2–1 mm.

uniseriate, 1.4–1.8 × 1–1.4 mm;

wing continuous, 0.1–0.25 mm wide.

uniseriate, 4–5 × 3–4 mm;

wing continuous, 1–1.5 mm wide.

= 21.