Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.5–2(–2.5) dm, glabrous or sparsely pubescent proximally, trichomes short-stalked, 2–6-rayed, 0.1–0.2 mm, glabrous distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 1–2.5 dm, densely pubescent proximally, trichomes short-stalked, 2–5-rayed, 0.2–0.6 mm, and sparse, simple ones to 1 mm, glabrous distally.

blade oblanceolate to obovate, 1.5–5 mm wide, margins usually entire, rarely slightly dentate, ciliate along petiole, surfaces densely to sparsely pubescent, trichomes short-stalked, 3–9-rayed, 0.1–0.2 mm.

blade narrowly oblanceolate, 1.5–3 mm wide, margins entire, ciliate along petiole, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.1–0.2 mm.

2–8(–12), not concealing stem;

blade auricles absent or 0.1–0.5 mm, surfaces of distalmost leaves glabrous or sparsely pubescent.

3–5, not concealing stem;

blade auricles 0.5–1 mm, surfaces of distalmost leaves pubescent.

3–12(–17)-flowered, usually unbranched.

10–22-flowered, unbranched.

divaricate-ascending at anthesis;

sepals glabrous or sparsely pubescent;

petals purple to lavender, 3.5–6 × 1–1.5 mm;

pollen ellipsoid or spheroid.

ascending at anthesis;

sepals pubescent;

petals white, 3–4 × 0.5–0.8 mm, glabrous;

pollen ellipsoid.

divaricate-ascending to slightly descending, usually slightly recurved, rarely straight, 2–6 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

divaricate-ascending, straight, 4–8 mm, sparsely pubescent, trichomes appressed, branched.

divaricate-ascending to slightly descending, not appressed to rachis, secund, straight or curved, edges parallel, (1.6–) 2–4.4 cm × 1.6–2.3 mm;

valves glabrous;

ovules 28 40(–44) per ovary;

style 0.1–0.2 mm.

divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 3–4 cm × 1.2–1.5 mm;

valves glabrous;

ovules 46–52 per ovary;

style ca. 0.1 mm.

uniseriate, 1.3–2 × 1–1.5 mm;

wing continuous, 0.1–0.5 mm wide.

uniseriate, 1–1.1 × 0.9–1 mm;

wing continuous, ca. 0.1 mm wide.

= 14.