Flora of North America species comparison

1–3 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 1–2.5 dm, glabrous throughout.

usually 2–6 per caudex branch, arising from margin of rosette near ground surface, 0.8–2(–2.5) dm, densely pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.08–0.3 mm, mixed with fewer simple ones, usually sparsely pubescent distally, rarely glabrous.

blade narrowly oblanceolate, 1–3(–6) mm wide, margins usually entire, rarely apically few-toothed, not ciliate, surfaces sparsely pubescent, trichomes short-stalked, 4–8-rayed, 0.08–0.2 mm.

blade linear-oblanceolate, 1–3(–4) mm wide, margins entire, ciliate proximally, trichomes to 0.8 mm, surfaces densely pubescent, trichomes short-stalked, 3–6-rayed, 0.08–0.3 mm.

4–8, not concealing stem;

blade auricles 1–2 mm, surfaces of distalmost leaves glabrous.

3–9, not concealing stem;

blade auricles 0.2–1 mm, surfaces of distalmost leaves glabrous or sparsely pubescent.

5–12(–18)-flowered, usually unbranched.

7–15-flowered, usually unbranched.

ascending at anthesis;

sepals glabrous;

petals lavender to purple, 4–5.5 × 1–1.5 mm, glabrous;

pollen spheroid.

divaricate-ascending at anthesis;

sepals pubescent;

petals white or lavender, 4–6 × 1–2 mm, glabrous;

pollen ellipsoid.

usually divaricate-ascending, rarely horizontal, straight, 2–5(–10) mm, glabrous.

divaricate, straight or slightly curved, 4–7 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

usually divaricate-ascending, rarely horizontal, not appressed to rachis, secund (often weakly so), straight, edges parallel, 3–5.5 cm × 1.5–2 mm;

valves glabrous;

ovules 42–54 per ovary;

style 0.05–0.1 mm.

horizontal to divaricate-descending, not appressed to rachis, not secund, straight to slightly curved, edges parallel, 2.5–4 cm × 1–1.5 mm;

valves glabrous;

ovules 36–54 per ovary;

style 0.1–0.2 mm.

uniseriate, 1.1–1.5 × 0.9–1.3 mm;

wing continuous, 0.1–0.3 mm wide.

uniseriate, 1–1.2 × 0.8–1 mm;

wing continuous, 0.1–0.15 mm wide.

= 14.