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 near ground surface, 2–6 dm, pubescent proximally, trichomes sessile, 2- or 3-rayed, 0.15–0.6 mm, glabrous 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 oblanceolate, 1.5–5(–7) mm wide, margins usually entire, rarely denticulate, ciliate at petiole base, trichomes to 0.4 mm, surfaces pubescent, trichomes sessile, 2–4(–6)-rayed, 0.1–0.45 mm.

4–8, not concealing stem;

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

(7–)13–42, concealing stem proximally;

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

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

(7–)14–45-flowered, usually unbranched.

ascending at anthesis;

sepals glabrous;

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

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals lavender, 6–10 × 1.5–2 mm, glabrous;

pollen spheroid.

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

erect, straight, 5–12 mm, glabrous.

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.

erect, appressed to rachis, not secund, straight, edges parallel, 4–6.5 cm × 1.5–2 mm;

valves glabrous;

ovules 60–140 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, 1.4–2 × 1–1.4 mm;

wing continuous, 0.1–0.35 mm wide.