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 1 per caudex branch, arising from center of rosette, elevated on woody base or from near ground surface, 1.5–4.5 dm, densely pubescent proximally, trichomes short-stalked, 2–7-rayed, 0.2–0.5 mm (sometimes mixed with some larger trichomes proximally), sparsely pubescent distally.

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, 2–5 mm wide, margins entire or denticulate, ciliate at petiole base, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.15–0.4 mm.

4–8, not concealing stem;

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

3–8, not concealing stem;

blade auricles 0.7–2 mm, surfaces of distalmost leaves sparsely pubescent.

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

11–22-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 whitish to pale lavender, 7–10 × 1.5–3 mm, glabrous;

pollen spheroid.

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

horizontal, straight or slightly curved, 7–14 mm, 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, not appressed to rachis, not secund, usually straight, edges parallel, 3.5–5 cm × 1.7–2 mm;

valves glabrous proximally, pubescent distally;

ovules 72–92 per ovary;

style 0.1–0.3 mm.

uniseriate, 1.1–1.5 × 0.9–1.3 mm;

wing continuous, 0.1–0.3 mm wide.

sub-biseriate, 1.1–1.3 × 0.7–1 mm;

wing continuous, ca. 0.1 mm wide.