Flora of North America species comparison

usually 2–6 per caudex branch, arising from margin of rosette near ground surface, 0.5–2 dm, glabrous or sparsely pubescent proximally, trichomes simple and short-stalked, 2-rayed, to 0.2 mm, glabrous 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 linear-oblanceolate, 1–2.5 mm wide, margins entire, ciliate along petiole, trichomes (simple), 0.4–0.7 mm, surfaces usually sparsely pubescent, rarely glabrous, trichomes short-stalked, 2- or 3-rayed, 0.1–0.4 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.

3–5, not concealing stem;

blade auricles 0–0.2 mm, surfaces of distalmost leaves usually glabrous or, rarely, margins sparsely ciliate.

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

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

6–13-flowered, unbranched.

10–65-flowered, usually unbranched.

divaricate-ascending at anthesis;

sepals glabrous or sparsely pubescent, trichomes spreading, 2-rayed;

petals white to lavender, 4–5 × 1.5–1.8 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals pubescent;

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

pollen spheroid.

horizontal to divaricate-descending, straight or slightly curved downward, 2–5 mm, glabrous.

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

horizontal or divaricate-descending, not appressed to rachis, secund, straight, edges parallel, 1.6–3.2 cm × 1.5–2 mm;

valves glabrous;

ovules 20–32 per ovary;

style 0.1–0.4 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, 1.2–1.5 × 0.8–0.9 mm;

not winged or with distal wing 0.05–0.1 mm wide.

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

wing continuous, 0.1–0.2 mm wide.

= 21.