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, often elevated above ground surface on woody base, 5–7 dm, glabrous or sparsely pubescent proximally, trichomes short-stalked, 2- or 3-rayed, 0.15–0.4 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, 3–8 mm wide, margins coarsely dentate, ciliate, trichomes (simple and 2-rayed), to 0.6 mm, surfaces sparsely to densely pubescent, trichomes short-stalked, 2–7-rayed, 0.15–0.4 mm.

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

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

15–65, concealing stem;

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

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

30–70-flowered, sometimes branched.

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 white or pale lavender, 8–10 × 1.5–2 mm, glabrous;

pollen ellipsoid.

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

divaricate-ascending, straight, 10–45 mm, glabrous.

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.

divaricate-ascending to horizontal, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 6–10 cm × 2.5–3 mm;

valves glabrous;

ovules 170–220 per ovary;

style 0.05–0.5 mm.

uniseriate, 1–1.4 × 0.8–1 mm;

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

biseriate, 1.2–1.6 × 0.9–1.2 mm;

wing continuous, 0.1–0.2 mm wide.

= 14.