Flora of North America species comparison

usually 2–4 per plant or caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 2–6 dm, pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.15–0.4 mm, sparsely pubescent or 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 obovate to oblanceolate, (6–)10–45 mm wide, margins dentate, not ciliate, surfaces sparsely pubescent, abaxially trichomes short-stalked, 3- or 4-rayed, 0.15–0.4 mm, adaxially simple ones, 0.4–1 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.

4–20, rarely concealing stem;

blade auricles 1–8 mm, surfaces of distalmost leaves sparsely pubescent.

3–5, not concealing stem;

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

14–66-flowered, sparingly branched.

10–22-flowered, unbranched.

divaricate at anthesis;

sepals glabrous or sparsely pubescent;

petals white or cream, 2–3.5 × 0.7–1 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

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

pollen ellipsoid.

divaricate-ascending to slightly descending, straight, 1–6 mm, glabrous or pubescent, trichomes appressed, branched.

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

divaricate-ascending to slightly descending, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 1.3–4.2 cm × 0.7–0.8 mm;

valves usually sparsely pubescent throughout, rarely glabrous;

ovules 14–44 per ovary;

style 0.1–0.5 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, 0.7–1.1 × 0.5–0.6 mm;

not winged.

uniseriate, 1–1.1 × 0.9–1 mm;

wing continuous, ca. 0.1 mm wide.