Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette, elevated above ground surface on woody base, 1.5–2.5 dm, glabrous throughout.

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.

blade oblanceolate, 3–8 mm wide, margins entire, ciliate proximally, trichomes (simple), 0.2–0.7 mm, surfaces glabrous or sparsely pubescent, trichomes short-stalked, 2–4-rayed, 0.2–0.4 mm.

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.

6–12, sometimes concealing stem proximally;

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

2–4, not concealing stem;

blade auricles absent, surfaces of distalmost leaves pubescent.

3–7-flowered, unbranched.

2–5-flowered, unbranched.

divaricate-ascending at anthesis;

sepals glabrous;

petals creamy white, 8–11 × 2–2.5 mm, glabrous;

pollen ellipsoid.

erect at anthesis;

sepals pubescent;

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

pollen ellipsoid.

strongly curved proximally, 4–6 mm, glabrous.

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

pendent, not appressed to rachis, not secund, straight to slightly curved, edges undulate (not parallel), 3.5–6 cm × 2.5–3.5 mm;

valves glabrous;

ovules 14–22 per ovary;

style 0.5–1 mm.

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.

uniseriate, 3–4 × 1.5–2 mm;

wing distal and proximal, 0.3–0.6 mm wide.

uniseriate, 3–5 × 2.5–4.5 mm;

wing continuous, 0.8–2 mm wide distally.