Flora of North America species comparison

usually 3–7 per caudex branch, arising from margin of rosette near ground surface, 0.5–2.5 dm, usually sparsely pubescent proximally, rarely glabrous, trichomes short-stalked, 2- or 3-rayed, 0.06–0.2 mm, glabrous distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, (1.2–)2–12 dm, glabrous or pubescent proximally, trichomes simple and sessile or subsessile, 2 or 3(–6)-rayed, to 1 mm, glabrous distally.

blade narrowly oblanceolate, 2–4 mm wide, margins entire or somewhat dentate, ciliate near petiole base, trichomes (simple), to 0.5 mm, surfaces sparsely pubescent, trichomes short-stalked, 2–5-rayed, 0.1–0.25 mm.

blade oblanceolate, 1.5–10(–20) mm wide, margins entire or dentate, ciliate proximally, trichomes (simple), to 1 mm, surfaces sparsely to densely pubescent, trichomes sessile or subsessile, 2–4(–7)-rayed, 0.2–0.6 mm.

3–7, not concealing stem;

blade auricles 0.5–1.5 mm, surfaces of distalmost leaves glabrous.

(10–)13–52, often concealing stem proximally;

blade auricles 1–5 mm, surfaces of distalmost leaves glabrous.

5–12-flowered, usually unbranched.

16–88-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals lavender, 5–7.5 × 0.8–1.5 mm, glabrous;

pollen spheroid.

divaricate at anthesis;

sepals glabrous or pubescent;

petals usually white, rarely lavender, 5.5–8 × 1–2 mm, glabrous;

pollen spheroid.

divaricate-ascending, straight, 8–12 mm, glabrous.

divaricate-ascending to descending, usually gently curved downward, rarely straight, 5–22(–30) mm, glabrous.

usually divaricate-ascending, rarely nearly horizontal, not appressed to rachis, not secund, curved to straight, edges parallel, 3–4.7 cm × 1–1.5 mm;

valves glabrous;

ovules 64–86 per ovary;

style 0.2–0.5 mm.

divaricate-ascending to pendent, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 3.5–9 cm × 1–1.8 mm;

valves glabrous;

ovules 84–146 per ovary;

style 0.05–0.5 mm.

uniseriate, 1.1–1.3 × 0.8–1.1 mm;

wing continuous, 0.08–0.1 mm wide.

uniseriate to sub-biseriate, 1–1.8 × 0.8–1.2 mm;

wing continuous, 0.1–0.25 mm wide.

= 21.