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

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 to ascending at anthesis;

sepals glabrous;

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

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

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

pollen ellipsoid.

ascending, straight, 4–10 mm, glabrous.

arched, gently recurved, 3–8(–12) mm, glabrous or sparsely pubescent, trichomes appressed, branched.

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.

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, 3–6 × 2–4 mm;

wing continuous, 1.3–2.5 mm wide.

sub-biseriate, 1–1.2 × 0.7–0.9 mm;

wing distal, 0.05–0.1 mm wide.

= 14.