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, elevated above ground surface on woody base, 0.8–4.5 dm, pubescent proximally, trichomes stalked, 2–4-rayed, to 0.5 mm, mixed with simple ones, to 1 mm, glabrous 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, 1–3 mm wide, margins entire, ciliate proximally, trichomes (simple), to 1 mm, surfaces moderately to sparsely pubescent, trichomes stalked, 2–4-rayed, 0.1–0.3(–0.5) mm.

2–4, not concealing stem;

blade auricles absent, surfaces of distalmost leaves pubescent.

3–17(–30), rarely concealing stem;

blade auricles 0.5–2.5 mm, surfaces of distalmost leaves glabrous.

2–5-flowered, unbranched.

6–20(–35)-flowered, usually unbranched.

erect at anthesis;

sepals pubescent;

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

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals deep purple to magenta, 8–12 × 2.5–4 mm, glabrous;

pollen ellipsoid.

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

divaricate-ascending to horizontal, straight, 10–18 mm, glabrous or sparsely pubescent, trichomes spreading, simple and 2-rayed.

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.

divaricate-ascending to widely pendent, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 5–7.5 cm × 1.8–2.5 mm;

valves glabrous;

ovules 58–94 per ovary;

style 0.05–0.2 mm.

uniseriate, 3–5 × 2.5–4.5 mm;

wing continuous, 0.8–2 mm wide distally.

uniseriate, 1.3–1.8 × 1.2–1.5 mm;

wing continuous, 0.1–0.2 mm wide.