Flora of North America species comparison

1 per caudex branch, arising from center of rosette near ground surface, ca. 1 dm, densely pubescent proximally, trichomes stalked, (2 or) 3–6-rayed, 0.2–0.5 mm, glabrate distally.

usually 1 per caudex, arising from center of rosette near ground surface, (1–)2.5–6.5 dm, densely pubescent proximally, trichomes short-stalked, 7–12-rayed, 0.1–0.2 mm, densely to sparsely pubescent distally.

blade oblanceolate, 4–6 mm wide, margins entire, not ciliate, surfaces moderately pubescent, trichomes long-stalked, 3–6 (or 7)-rayed, 0.2–0.5 mm.

blade oblanceolate, 1–4(–8) mm wide, margins entire, ciliate along petiole and proximally, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 3–10-rayed, 0.2–0.7 mm.

2–5, concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves pubescent.

(7–)12–35, concealing stem proximally;

blade auricles 0.5–2 mm, surfaces of distalmost leaves densely pubescent.

3- or 4-flowered, unbranched.

10–65-flowered, usually unbranched.

not seen.

ascending at anthesis;

sepals pubescent;

petals lavender to purplish, 5–8 × 1.2–2 mm, glabrous;

pollen spheroid.

erect-ascending, straight, 4–5 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

divaricate-ascending to horizontal, straight or slightly curved downward, 5–15 mm, sparsely pubescent, trichomes appressed, branched.

erect-ascending, sometimes appressed to rachis, not secund, straight, edges parallel, 3–4 cm × ca. 5 mm;

valves glabrous;

ovules ca. 16 per ovary;

style 0.5–0.7 mm.

divaricate-ascending to widely pendent, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 3.7–6.5 cm × 1.5–2.2 mm;

valves glabrous;

ovules 74–134 per ovary;

style 0.05–0.2 mm.

uniseriate, 5.5–6.5 × 4–4.5 mm;

wing continuous, 1–2 mm wide.

usually sub-biseriate, rarely uniseriate, 1.7–2 × 1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.

= 21.