Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.3–1.5 dm, densely pubescent proximally, trichomes simple and short-stalked, 2–4-rayed, (0.07–)0.1–0.2 mm, glabrous or sparsely pubescent distally.

usually 2–5 per caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, (0.5–)1.5–4 dm, densely pubescent proximally, trichomes short-stalked, 2–6-rayed, 0.1–0.3 mm, glabrous or sparsely pubescent distally.

blade linear-oblanceolate, 1–3(–5) mm wide, margins entire, ciliate proximally, trichomes to 0.4 mm, surfaces densely pubescent, trichomes short-stalked, 2–6-rayed, (0.07–)0.1–0.2 mm.

blade oblanceolate to obovate, 5–11(–13) mm wide, margins shallowly dentate or, sometimes, entire, often ciliate along petiole, trichomes (simple and 2-rayed), surfaces moderately pubescent, trichomes short-stalked, 4–8-rayed, 0.1–0.3 mm.

2–6, rarely concealing stem;

blade auricles 0 (or 0.2–1.5) mm, surfaces of distalmost leaves glabrous.

3–8(–11), not concealing stem;

blade auricles (0.5–)1–2 mm, surfaces of distalmost leaves sparsely pubescent.

3–8-flowered, unbranched.

4–15(–20)-flowered, usually unbranched.

erect at anthesis;

sepals glabrous or sparsely pubescent;

petals lavender to purplish, 4–6(–7) × 1–2 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals usually lavender, rarely whitish, 5–9 × 1.2–2.5 mm, glabrous;

pollen ellipsoid.

erect, straight, 3–9 mm, glabrous or sparsely pubescent.

ascending to divaricate-ascending, straight or, sometimes, recurved, 7–15 mm, glabrous or sparsely pubescent.

erect, appressed to rachis, not secund, straight, edges parallel, 2.5–5.5 cm × 1.3–1.7(–2) mm;

valves glabrous;

ovules 24–40 per ovary;

style 0.2–1 mm.

usually ascending, rarely horizontal, not appressed to rachis, not secund, straight to curved, edges parallel, 2.5–5(–6.5) cm × 1–2 mm;

valves glabrous;

ovules 44–62 per ovary;

style 0.05–0.4 mm.

usually uniseriate, rarely sub-biseriate, 1.5–2(–2.5) × 1–1.4 mm;

wing continuous, 0.3–1 mm wide.

uniseriate, 1.1–1.3 × 1–1.1 mm;

wing nearly continuous, 0.07–0.15 mm wide.