Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (1–)2–9 dm, densely pubescent proximally, trichomes short- to long-stalked, 2–6-rayed, 0.2–0.5 mm, rarely mixed with simple ones, to 1.5 mm, glabrous or sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette, elevated above ground surface on woody base, (2–)3.5–13 dm, densely pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.3–0.9 mm, moderately to sparsely pubescent distally.

blade broadly oblanceolate to obovate, 7–25(–50) mm wide, margins usually repand to coarsely dentate, rarely entire, not ciliate, surfaces moderately to densely pubescent, trichomes short- to long-stalked, 3–6-rayed, 0.2–0.5 mm.

blade linear to oblanceolate, 3–10(–13) mm wide, margins entire or denticulate, ciliate along petiole, trichomes to 1.3 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.2–0.5 mm.

(3–)8–30, not concealing stem;

blade auricles absent, surfaces of distalmost leaves sparsely pubescent.

12–35(–55), often concealing stem proximally;

blade auricles 1–5(–6) mm, surfaces of distalmost leaves pubescent.

7–25-flowered, sometimes branched.

30–120-flowered, usually unbranched.

erect to ascending at anthesis;

sepals glabrous or sparsely pubescent;

petals white, 3.5–6 × 0.8–1 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals pubescent;

petals usually purple, rarely pinkish, 9–14 × 1.5–3 mm, glabrous or sparsely pubescent (trichomes scattered abaxially);

pollen spheroid.

erect to divaricate-ascending, straight, 3–10 mm, glabrous or pubescent, trichomes spreading, usually 2–5-rayed, rarely simple.

descending to horizontal, usually recurved, rarely straight, 4–20 mm, pubescent, trichomes appressed, 3–7-rayed.

divaricate-ascending, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, (3.5–)5–13.5 cm × 2.5–4 mm;

valves glabrous or pubescent throughout;

ovules 34–50 per ovary;

style 0.5–1.5 mm.

widely pendent, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, (6–)8–12 cm × 1.5–2.5 mm;

valves glabrous or trichomes sometimes scattered;

ovules 140–180 per ovary;

style 0.05–0.3 mm.

uniseriate, 2.5–5(–6) × 2–3(–3.5) mm;

wing continuous, 0.7–1.8 mm wide.

uniseriate or sub-biseriate, 1.7–2 × 1.2–1.7 mm;

wing continuous, 0.2–0.4 mm wide.

= 14.