Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (1.5–)2.5–8 dm, densely pubescent proximally, trichomes simple and short-stalked, 2-rayed, to 1 mm, sparsely pubescent or glabrous distally.

usually 1 per caudex branch, arising from center of rosette, elevated on woody base above or near ground surface, 0.6–2.8(–3.5) dm, densely pubescent proximally, trichomes short-stalked, 2–5-rayed, 0.1–0.3 mm, glabrous or sparsely pubescent distally.

blade oblanceolate, 1–7 mm wide, margins entire or dentate, ciliate along petiole, trichomes (simple), to 0.7 mm, surfaces moderately to densely pubescent, trichomes short-stalked, 5–8-rayed, 0.15–0.4 mm.

blade narrowly oblanceolate, 3–7(–10) mm wide, margins entire, ciliate near petiole base, trichomes (simple or spurred), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 2–4 (or 5)-rayed 0.1–0.3 mm.

(8–)15–40, concealing stem proximally;

blade auricles 1–3 mm, surfaces of distalmost leaves usually sparsely pubescent.

3–7(–12), not concealing stem;

blade auricles absent, surfaces of distalmost leaves glabrous or sparsely pubescent.

(15–)30–90-flowered, usually unbranched.

2–7-flowered, unbranched.

descending to pendent at anthesis;

sepals pubescent;

petals usually white, rarely lavender, 4–6 × 0.8–1.5 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals creamy white to purplish, 4–6 × 1–2 mm, sparsely pubescent (often some trichomes abaxially);

pollen ellipsoid.

reflexed, abruptly recurved at base, otherwise straight, 4–13 mm, glabrous or sparsely pubescent, trichomes usually simple.

ascending, straight, 3–13 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

strongly reflexed, usually appressed to rachis, rarely somewhat secund, straight, edges parallel, 3.5–6 cm × 0.9–1.5 mm;

valves glabrous;

ovules 70–126 per ovary;

style 0.2–0.5 mm.

ascending, not appressed to rachis, not secund, straight to slightly curved, edges undulate (not parallel), (2.5–)4–8.5 cm × 3–5.5 mm;

valves glabrous;

ovules 16–44 per ovary;

style 0.05–1 mm.

uniseriate, 1–1.4 × 0.8–1 mm;

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

uniseriate, 3–6(–8) × 2–3.5 mm;

wing continuous, 0.8–2.5 mm wide.

= 14.

= 14.