Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.6–2(–3) dm, glabrous throughout.

usually 2–6 per caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.6–3(–3.7) dm, sparsely to densely pubescent proximally, trichomes simple, 0.3–0.8 mm, glabrous distally.

blade narrowly oblanceolate, 1–7 mm wide, margins entire, ciliate proximally, trichomes (simple mixed with a few short-stalked, 2-rayed ones) 0.1–0.4 mm, surfaces glabrous.

blade oblanceolate to obovate, 1.5–6 mm wide, margins usually entire, rarely dentate, ciliate throughout, trichomes (usually simple), 0.4–1 mm, surfaces pubescent, trichomes simple and short- and long-stalked, 2-rayed, 0.3–0.8 mm.

2–4, not concealing stem;

blade auricles (0–)0.2–1 mm, surfaces of distalmost leaves usually glabrous, rarely ciliate proximally.

2–10(–13), not concealing stem;

blade auricles absent or, rarely, to 0.7 mm, surfaces of distalmost leaves glabrous or margins sparsely ciliate.

2–5-flowered, unbranched.

4–14-flowered, usually unbranched.

erect to ascending at anthesis;

sepals glabrous;

petals white to dark lavender, 4–8 × 1–2.5 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals usually sparsely pubescent, rarely glabrous;

petals whitish to pale lavender, 4–6 × 1–1.5 mm, glabrous;

pollen ellipsoid or spheroid.

ascending, straight, 4–10 mm, glabrous.

divaricate-ascending to horizontal, curved or angled downward, 3–7(–10) mm, usually glabrous, rarely with some simple trichomes.

suberect to ascending, usually not appressed to rachis, not secund, straight to curved, edges often somewhat undulate (not parallel), 2.5–6.5 cm × 3–7 mm;

valves glabrous;

ovules 10–20 per ovary;

style 0.05–0.3 mm.

widely pendent, not appressed to rachis, not secund, curved to nearly straight, edges parallel, 2.2–4 cm × 1.2–2.1 mm;

valves glabrous;

ovules 40–70(–90) per ovary;

style 0.1–0.3(–0.5) mm.

uniseriate, 3–6 × 2–4 mm;

wing continuous, 1.3–2.5 mm wide.

biseriate, 0.9–1.2 × 0.6–0.9 mm, usually not winged.

= 14, 21.