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 near ground surface, 1–4 dm, glabrous or sparsely pubescent proximally, trichomes sessile or subsessile, 2- or 3-rayed, 0.1–0.3 mm, glabrous 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 oblanceolate, 2–6 mm wide, margins entire, ciliate along petiole, trichomes (submalpighiaceous or simple), to 0.6 mm, surfaces sparsely to densely pubescent, trichomes subsessile, 2–6-rayed, 0.1–0.3 mm.

(3–)8–30, not concealing stem;

blade auricles absent, surfaces of distalmost leaves sparsely pubescent.

3–15, often concealing stem proximally;

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

7–25-flowered, sometimes branched.

5–25-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.

ascending at anthesis;

sepals glabrous or pubescent with scattered trichomes;

petals purple to lavender, 6–8 × 1.5–2.5 mm, glabrous;

pollen spheroid.

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

horizontal to ascending, straight or curved, 4–8 mm, glabrous.

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.

horizontal to ascending, secund, straight to slightly curved, edges parallel, 3–5.8 cm × 2–3.5 mm;

valves glabrous;

ovules 44–76(–104) per ovary;

style 0.05–0.5 mm.

uniseriate, 2.5–5(–6) × 2–3(–3.5) mm;

wing continuous, 0.7–1.8 mm wide.

uniseriate, 1.5–2.2 × 1.2–1.6 mm;

wing continuous, 0.3–0.7 mm wide.

= 14.