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 1 per caudex branch, arising from center of rosette, elevated on woody base or from ground surface, (2–)3–8 dm, densely pubescent proximally, trichomes short-stalked, 2-rayed and simple, to 1 mm, 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 linear to oblanceolate, 2–7(–12) mm wide, margins usually entire, rarely denticulate, ciliate along petiole, trichomes to 1.5 mm, surfaces densely pubescent, trichomes usually short-stalked, 2–5-rayed (rarely some simple), 0.4–0.8 mm.

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

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

10–30(–45), often concealing stem proximally;

blade auricles 2–5(–6) mm, surfaces of distalmost leaves pubescent.

17–60-flowered, usually unbranched.

12–50(–70)-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 purple, 9–14 × 2–4 mm, glabrous or sparsely pubescent (trichomes abaxially);

pollen ellipsoid.

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

usually divaricate-ascending, rarely horizontal, gently recurved or straight, 8–22 mm, pubescent, trichomes subappressed, 2–4-rayed.

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 divaricate-ascending, rarely horizontal, not appressed to rachis, not secund, usually curved, edges parallel, (6–)8–13 cm × 1.5–2.2 mm;

valves glabrous or trichomes relatively few, scattered;

ovules 90–250 per ovary;

style 0.01–0.5 mm.

uniseriate, 1.4–1.8 × 1–1.4 mm;

wing continuous, 0.1–0.25 mm wide.

uniseriate or sub-biseriate, 1.5–1.7 × 1–1.2 mm;

wing continuous, 0.1–0.2 mm wide.

= 21.