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, 2–7 dm, sparsely to densely pubescent proximally, trichomes subsessile, sub-malpighiaceous, 0.3–0.6 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, 3–7 mm wide, margins entire, ciliate proximally, trichomes (simple), to 0.8 mm, surfaces sparsely to densely pubescent, trichomes subsessile, 2–5-rayed, 0.2–0.55 mm.

2–4, not concealing stem;

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

7–17, often concealing stem proximally;

blade auricles 2–5 mm, surfaces of distalmost leaves sparsely pubescent or glabrous.

2–5-flowered, unbranched.

19–39-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 to pendent at anthesis;

sepals pubescent;

petals white to pale lavender, 6–7 × 1.2–2 mm, glabrous;

pollen spheroid.

ascending, straight, 4–10 mm, glabrous.

reflexed, recurved proximally, 5–13 mm, glabrous.

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.

reflexed, rarely appressed to rachis, not secund, straight, edges parallel, 4–7(–8.5) cm × 2–2.3 mm;

valves glabrous;

ovules 88–104 per ovary;

style 0.3–0.7 mm.

uniseriate, 3–6 × 2–4 mm;

wing continuous, 1.3–2.5 mm wide.

sub-biseriate, 2–2.5 × 1.1–1.5 mm;

wing continuous, 0.15–0.25 mm wide.