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 slightly elevated above ground surface on woody base, 2–5 dm, glabrous throughout.

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 oblanceolate, 5–12 mm wide, margins dentate, ciliate (at least proximally), trichomes (usually simple), 1–2 mm, surfaces moderately pubescent, trichomes short-stalked, 2–4-rayed, 0.4–0.6 mm.

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

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

5–12, often concealing stem proximally;

blade auricles 1–2 mm, surfaces distally glabrous.

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

10–35-flowered, usually unbranched.

descending to pendent at anthesis;

sepals pubescent;

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

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals glabrous;

petals white to lavender, 5–8 × 1.5–2 mm, glabrous;

pollen ellipsoid.

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

horizontal to divaricate-ascending, curved or angled downward, 10–20 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.

widely pendent, not appressed to rachis, not secund, curved to nearly straight, edges parallel, 3.5–5 cm × 2.5–3 mm;

valves glabrous;

ovules 80–130 per ovary;

style 0.2–0.7 mm.

uniseriate, 1–1.4 × 0.8–1 mm;

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

biseriate, 1.1–1.3 × 0.9–1 mm;

wing distal or continuous, 0.1–0.15 mm wide.

= 14.