Flora of North America species comparison

1 or few per caudex branch, arising from center or margin of rosette, somewhat elevated on woody base or near ground surface, (0.7–)2–3.5 dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.05–0.15 mm, moderately to sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.5–1.8 dm, densely pubescent proximally, trichomes short-stalked, 5–8-rayed, 0.1–0.2, sparsely to moderately pubescent distally.

blade narrowly oblanceolate, 2–5 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.05–0.15 mm.

blade narrowly oblanceolate, 1–2 mm wide, margins entire, ciliate along petiole, trichomes (branched), to 0.5 mm, surfaces densely pubescent, trichomes short-stalked, 5–8-rayed, 0.1–0.2 mm.

4–10, often concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves sparsely to moderately pubescent.

4–14, rarely concealing stem proximally;

blade auricles 0.1–0.5 mm, surfaces of distalmost leaves densely pubescent.

5–12-flowered, usually unbranched.

10–20-flowered, unbranched.

divaricate at anthesis;

sepals pubescent;

petals purple to lavender, 6–10 × 1.5–2.5 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

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

pollen ellipsoid.

descending, recurved, 4–14 mm, pubescent, trichomes appressed, branched.

divaricate-descending or horizontal, nearly straight, 3–7 mm, pubescent, trichomes appressed, branched.

pendent, usually not appressed to rachis, rarely secund, straight or curved, 2–5 cm × 1.7–2.2 mm;

valves glabrous or pubescent throughout;

ovules 26–36 per ovary;

style 0.2–0.9 mm.

usually divaricate-descending or horizontal, rarely widely pendent, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 3–4.5 cm × 2.5–3 mm;

valves sparsely pubescent to glabrate;

ovules 20–24 per ovary;

style 1.5–2 mm.

uniseriate, 1.5–2 × 1–1.5 mm;

wing distal or continuous, 0.1–0.2 mm wide.

uniseriate, 2–2.5 × 1.5–1.8 mm;

wing continuous, to 0.2 mm wide.