Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 2–6.7 dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.1–0.3 mm, glabrous or sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette, slightly elevated on woody base or from near ground surface, 2–6 dm, pubescent proximally, trichomes usually subsessile, 2- or 3-rayed, rarely simple, 0.25–0.4 mm, glabrous distally.

blade oblanceolate, 2–5 mm wide, margins entire, sometimes ciliate near petiole base, trichomes (usually simple), to 0.7 mm, surfaces sparsely to moderately pubescent, trichomes short-stalked, 4–8-rayed, 0.1–0.3 mm.

blade oblanceolate, 2–6 mm wide, margins entire, ciliate proximally, trichomes to 0.7 mm, surfaces sparsely pubescent, trichomes subsessile to short-stalked, 2–5-rayed, 0.1–0.4 mm.

7–40, often concealing stem proximally;

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

5–10, rarely concealing stem proximally;

blade auricles 0.5–2 mm, surfaces of distalmost leaves glabrous.

10–60-flowered, usually unbranched.

5–16-flowered, usually unbranched.

divaricate to pendent at anthesis;

sepals pubescent;

petals white, 4–8 × 1–2 mm, glabrous;

pollen ellipsoid or spheroid.

ascending at anthesis;

sepals glabrous;

petals purple, 6–8 × 1.5–2 mm, glabrous;

pollen spheroid.

descending to reflexed, most abruptly recurved near base, 5–10 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

divaricate-ascending, straight, 4–10 mm, glabrous.

descending to reflexed, not appressed to rachis, strongly secund, often curved, edges parallel, 0.35–0.65 cm × (2–)2.2–2.5 mm;

valves glabrous;

ovules 80–102 per ovary.

divaricate-ascending, not appressed to rachis, not secund, straight, edges somewhat undulate (not parallel), 4–6.5(–7.6) cm × 2.5–3.5 mm;

valves glabrous;

ovules 24–54 per ovary;

style 0.2–0.8 mm.

uniseriate to sub-biseriate, 1.4–1.7 × 1–1.2 mm;

wing continuous, to 0.2 mm wide.

uniseriate, 2.5–3.2 × 1.8–2.5 mm;

wing distal, 0.3–1 mm wide.

= 14, 21.