Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 1–2.5 dm, glabrous or sparsely pubescent proximally, trichomes short-stalked, 2–5-rayed (rarely, some simple), 0.4–0.6 mm, glabrous distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 2.6–7.4(–10.2) dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.1–0.5 mm, sometimes mixed with 2- or 3-rayed ones, to 1 mm, usually sparsely pubescent distally, rarely glabrous.

blade oblanceolate, 2.5–6 mm wide, margins entire, ciliate proximally, trichomes (simple), surfaces densely pubescent, trichomes short-stalked, 4–7-rayed, 0.3–0.5 mm.

blade oblanceolate, 3–8(–10) mm wide, margins entire or shallowly dentate, ciliate near petiole base, trichomes (simple), to 1 mm, surfaces moderately to densely pubescent, trichomes short-stalked, 4–8-rayed, 0.15–0.4 mm.

3–12, often concealing stem proximally;

blade auricles 0.5–2 mm, surfaces of distalmost leaves usually glabrous, sometimes margins ciliate.

22–72, concealing stem proximally;

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

12–25-flowered, usually unbranched.

25–112-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals purple, 5–6 × 1.5–2 mm, glabrous;

pollen spheroid.

divaricate-ascending at anthesis;

sepals pubescent;

petals white to lavender, 6–8 × 1–1.5 mm, glabrous;

pollen spheroid.

ascending to divaricate-descending, straight, 2–6 mm, glabrous.

divaricate-descending, straight or gently curved, (10–)15–28 mm, usually sparsely pubescent, rarely glabrous, trichomes appressed, branched.

ascending to divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 2–3.7 cm × 2–2.8 mm;

valves glabrous;

ovules 56–80 per ovary;

style 0.1–0.3 mm.

pendent, not appressed to rachis, not secund, straight or gently curved, edges parallel, 4.5–6.5 cm × 1.5–3 mm;

valves glabrous;

ovules 100–136 per ovary;

style to 0.2 mm.

uniseriate, 1–1.5 × 0.8–1 mm;

wing distal or continuous, 0.05–0.1 mm wide.

biseriate or sub-biseriate, 1–1.4 × 0.9–1 mm;

wing continuous, 0.05–0.15 mm.