Flora of North America species comparison

usually 2–7 per caudex branch, arising from margin of rosette near ground surface, 0.5–2(–3) dm, densely pubescent proximally, trichomes simple and stalked, 2-rayed, 0.3–0.8 mm, glabrous distally.

1 per plant, arising from center of rosette near ground surface, (1.5–)3–11 dm, glabrous throughout.

blade narrowly oblanceolate, 1–3 mm wide, margins entire, ciliate, trichomes to 1 mm, surfaces pubescent, trichomes stalked, 2–4-rayed, 0.3–0.8 mm.

blade obovate to oblanceolate, (4–)10–40 mm wide, margins serrate or dentate, ciliate-mucronate on teeth, trichomes often minute, surfaces glabrous or sparsely pubescent, trichomes simple, 0.1–0.6 mm.

3–7(–10), not concealing stem;

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

7–15, often concealing stem proximally;

blade auricles 3–12(–17) mm, surfaces of distalmost leaves glabrous.

6–15-flowered, unbranched.

16–45-flowered, sometimes branched.

ascending at anthesis;

sepals pubescent;

petals white or lavender, 5–7 × 1.5–2.5 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals white, 3–5 × 1–1.5 mm, glabrous;

pollen ellipsoid.

horizontal to divaricate-ascending, straight, 3–9 mm, glabrous.

suberect to divaricate-ascending, straight to slightly curved, 5–23 mm, glabrous.

horizontal to divaricate-ascending, not appressed to rachis, not secund, usually strongly curved, edges parallel, 3.5–6.5 cm × 1.7–2 mm;

valves glabrous;

ovules 50–84 per ovary;

style 0.05–0.5 mm.

divaricate-ascending, not appressed to rachis, rarely somewhat secund, curved, edges parallel, (4–)6–11.7 cm × 1–2 mm;

valves glabrous;

ovules 50–80 per ovary;

style 0.1–0.7(–1) mm.

uniseriate, 1.5–2 × 1.1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.

uniseriate, 1.2–2.2 × 0.8–1.4 mm;

wing continuous, 0.1–0.3 mm wide distally.

= 14.