Flora of North America species comparison

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.

simple or few to several per caudex branch, arising from center of rosette near ground surface, 1.5–3.5(–5) dm, densely pubescent proximally, trichomes simple mixed with short-stalked ones, 2-rayed, 0.3–0.7 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.

blade narrowly oblanceolate, 1.5–3(–4) mm wide, margins entire, strongly ciliate at least along petiole, trichomes (simple), to 1 mm, surfaces glabrous or sparsely pubescent, trichomes simple and short-stalked, 2-rayed, 0.3–0.7 mm.

2–4, not concealing stem;

blade auricles absent, surfaces of distalmost leaves pubescent.

5–15(–20), often concealing stem proximally;

blade auricles 0.5–1.5 mm, surfaces of distalmost leaves usually glabrous.

2–5-flowered, unbranched.

10–30-flowered, usually unbranched.

erect at anthesis;

sepals pubescent;

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

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals pubescent;

petals usually white, rarely pale lavender, 3–3.7(–4) × 0.5–0.8 mm, glabrous;

pollen ellipsoid.

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

horizontal or slightly descending, curved or angled downward, 6–10(–15) mm, usually glabrous, rarely sparsely pubescent, trichomes spreading, simple.

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.

pendent, not appressed to rachis, rarely slightly secund, straight or gently curved, edges parallel, 3.3–5.7 cm × 1.2–1.8 mm;

valves glabrous;

ovules 90–126 per ovary;

style 0.1–0.4 mm.

uniseriate, 3–5 × 2.5–4.5 mm;

wing continuous, 0.8–2 mm wide distally.

biseriate, 0.7–0.9 × 0.5–0.6 mm;

wing distal or, sometimes, absent, 0.05–0.1 mm wide.

= 14.