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.

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.6–3 dm, densely pubescent proximally, trichomes simple and stalked, 2–4-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, 1.5–4(–5) mm wide, margins entire, often ciliate along petiole, trichomes (simple), to 0.6 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.08–0.2 mm.

2–4, not concealing stem;

blade auricles absent, surfaces of distalmost leaves pubescent.

6–17, sometimes concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves glabrous or sparsely pubescent.

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.

ascending at anthesis;

sepals pubescent;

petals white or lavender, 4–6 × 1–1.5 mm, glabrous;

pollen ellipsoid.

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

arched, gently recurved, 3–8(–12) mm, glabrous or 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.

pendent, not appressed to rachis, not secund, usually straight, edges parallel, (2–)2.5–3.8 cm × 1.5–2.2 mm;

valves glabrous;

ovules 66–92 per ovary;

style 0.3–0.5 mm.

uniseriate, 3–5 × 2.5–4.5 mm;

wing continuous, 0.8–2 mm wide distally.

sub-biseriate, 1–1.2 × 0.7–0.9 mm;

wing distal, 0.05–0.1 mm wide.

= 14.