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.

usually 2–5 per caudex branch, arising from margin of rosette near ground surface, 0.8–2(–3) 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 oblanceolate, (2–)3–7 mm wide, margins usually entire, rarely denticulate, ciliate, trichomes (simple and short-stalked) 2- or 3-rayed, 0.2–0.4 mm, surfaces glabrous.

3–7(–10), not concealing stem;

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

3–5, not concealing stem;

blade auricles absent or, rarely, to 0.5 mm, surfaces of distalmost leaves glabrous.

6–15-flowered, unbranched.

10–16-flowered, usually unbranched.

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 to lavender, 4–5 × 1.2–1.7 mm, glabrous;

pollen ellipsoid.

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

ascending, straight, 3–7 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.

ascending, not appressed to rachis, not secund, straight, edges parallel, 1.5–3.7 cm × 1.4–1.7 mm;

valves glabrous;

ovules 14–22 per ovary;

style 0.2–0.6 mm.

uniseriate, 1.5–2 × 1.1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.

uniseriate, 1.7–2.2 × 1–1.2 mm;

wing absent or distal, 0–0.5 mm wide.