Flora of North America species comparison

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.

usually 2–4 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.6–2 dm, glabrous throughout.

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.

blade oblanceolate, 2–6 mm wide, margins entire, rarely ciliate along petiole, trichomes (simple), 0.5–0.7 mm, surfaces glabrous.

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

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

5–9, rarely concealing stem proximally;

blade auricles 0.7–2.5 mm, surfaces of distalmost leaves glabrous.

10–30-flowered, usually unbranched.

4–12-flowered, usually unbranched.

divaricate-ascending at anthesis;

sepals pubescent;

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

pollen ellipsoid.

ascending at anthesis;

sepals glabrous;

petals lavender, 4–5.5 × 1.5–2 mm, glabrous;

pollen ellipsoid.

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

divaricate-ascending to horizontal, straight, 2.5–8 mm, glabrous.

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.

usually divaricate-ascending, rarely slightly descending, usually secund, straight to slightly curved, 1.9–4 cm × 2–3 mm;

valves glabrous;

ovules 52–72 per ovary;

style 0.05–0.2 mm.

biseriate, 0.7–0.9 × 0.5–0.6 mm;

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

biseriate, 1.1–1.4 × 0.8–1 mm;

wing continuous, 0.07–0.15 mm wide.

= 14.