Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (1.4–)3–11.2 dm, densely pubescent proximally, trichomes simple, 0.6–1.5 mm, mixed with stalked, 2- (or 3-)rayed ones, 0.2–0.4 mm, 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 oblanceolate, 3–10 mm wide, margins usually dentate, rarely entire, sometimes ciliate, trichomes (simple or branched), to 1 mm, surfaces densely pubescent, trichomes stalked, 2–5-rayed, 0.3–0.6 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.

(8–)14–60, often concealing stem proximally;

blade auricles (1–)3–10 mm, surfaces of distalmost leaves glabrous or sparsely pubescent.

3–8(–11), not concealing stem;

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

17–60-flowered, usually unbranched.

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

divaricate at anthesis;

sepals pubescent;

petals lavender to whitish, 5–8 × 1–2 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals pubescent;

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

pollen ellipsoid.

horizontal to divaricate-descending, usually straight, rarely slightly recurved, 4–13 mm, pubescent, trichomes spreading, 2- or 3-rayed.

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

horizontal, divaricate-descending or widely pendent, not appressed to rachis, not secund, curved, edges parallel, 5.5–10.5 cm × 1.5–2.2 mm;

valves glabrous;

ovules 80–162 per ovary;

style 0.05–0.5 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.

uniseriate, 1.4–1.8 × 1–1.4 mm;

wing continuous, 0.1–0.25 mm wide.

uniseriate, 1.1–1.3 × 1–1.1 mm;

wing nearly continuous, 0.07–0.15 mm wide.

= 21.