Flora of North America species comparison

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.

usually 2–5 per caudex branch, arising from margin of rosette near ground surface, 0.8–2(–3) dm, glabrous throughout.

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.

blade oblanceolate, (2–)3–7 mm wide, margins usually entire, rarely denticulate, ciliate, trichomes (simple and short-stalked) 2- or 3-rayed, 0.2–0.4 mm, surfaces glabrous.

7–17, often concealing stem proximally;

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

3–5, not concealing stem;

blade auricles absent or, rarely, to 0.5 mm, surfaces of distalmost leaves glabrous.

19–39-flowered, usually unbranched.

10–16-flowered, usually unbranched.

divaricate to pendent at anthesis;

sepals pubescent;

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

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals white to lavender, 4–5 × 1.2–1.7 mm, glabrous;

pollen ellipsoid.

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

ascending, straight, 3–7 mm, glabrous.

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.

ascending, not appressed to rachis, not secund, straight, edges parallel, 1.5–3.7 cm × 1.4–1.7 mm;

valves glabrous;

ovules 14–22 per ovary;

style 0.2–0.6 mm.

sub-biseriate, 2–2.5 × 1.1–1.5 mm;

wing continuous, 0.15–0.25 mm wide.

uniseriate, 1.7–2.2 × 1–1.2 mm;

wing absent or distal, 0–0.5 mm wide.