Flora of North America species comparison

usually 2–5 per caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.2–0.8 dm, pubescent proximally, trichomes simple and short-stalked, 2- or 3-rayed, to 0.4 mm, glabrescent distally.

1–5 per caudex branch, arising from center or margin of rosette near ground surface, 1–3 dm, sparsely pubescent proximally, trichomes subsessile, 2–5-rayed, 0.1–0.4 mm, glabrous or sparsely pubescent distally.

blade linear, 0.8–1.5 mm wide, margins entire, ciliate, trichomes (simple and spurred), to 0.8 mm, surfaces moderately pubescent, trichomes short-stalked, 2–4-rayed, 0.05–0.4 mm.

blade narrowly oblanceolate, 2–6 mm wide, margins entire, ciliate at petiole base, trichomes (simple), to 0.4 mm, surfaces moderately pubescent, trichomes sessile or subsessile, 2–5-rayed, 0.1–0.4 mm.

2–4, not concealing stem;

blade auricles absent, surfaces of distalmost leaves pubescent.

3–6, not concealing stem;

blade auricles absent or 0.2–0.5 mm, surfaces of distalmost leaves glabrous, or sparsely pubescent along margins.

2–5-flowered, unbranched.

4–11-flowered, unbranched.

erect at anthesis;

sepals pubescent;

petals white, 3.5–5 × 0.7–1 mm, glabrous;

pollen ellipsoid.

erect to ascending at anthesis;

sepals glabrous;

petals usually lavender, rarely whitish, 4–7 × 1.2–2 mm, glabrous;

pollen spheroid.

erect to ascending, straight, 2–7 mm, usually pubescent, rarely glabrous, trichomes subappressed, branched.

erect to ascending, straight, 4–8 mm, usually glabrous, rarely sparsely pubescent, trichomes appressed, branched.

erect to ascending, often appressed to rachis, not secund, straight, edges parallel, (1.3–)2–3.3 cm × 4–5 mm;

valves glabrous;

ovules 8–12 per ovary;

style 0.05–0.4 mm.

erect to ascending, often appressed to rachis, not secund, straight, edges often slightly undulate (not parallel), 3–7 cm × 2–3 mm;

valves glabrous;

ovules 26–42 per ovary;

style 0.05–0.3 mm.

uniseriate, 3–5 × 2.5–4.5 mm;

wing continuous, 0.8–2 mm wide distally.

uniseriate, 2.5–3.5 × 1.8–2.5 mm;

wing continuous, 0.4–0.9 mm wide.