Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 1–4.5 dm, densely pubescent proximally, trichomes sessile, 2–4-rayed, 0.15–0.5 mm, glabrous distally.

1 per plant, arising from center of rosette near ground surface, (1.5–)3–11 dm, glabrous throughout.

blade oblanceolate, 5–15 mm wide, margins denticulate, ciliate proximally, trichomes (simple), to 1 mm, surfaces moderately pubescent, trichomes subsessile, (2- or) 3–7-rayed, 0.1–0.3 mm.

blade obovate to oblanceolate, (4–)10–40 mm wide, margins serrate or dentate, ciliate-mucronate on teeth, trichomes often minute, surfaces glabrous or sparsely pubescent, trichomes simple, 0.1–0.6 mm.

4–15, not concealing stem;

blade auricles 1–3.5 mm, surfaces of distalmost leaves glabrous.

7–15, often concealing stem proximally;

blade auricles 3–12(–17) mm, surfaces of distalmost leaves glabrous.

11–41-flowered, usually unbranched.

16–45-flowered, sometimes branched.

divaricate at anthesis;

sepals pubescent;

petals white, 6–7 × 1–2 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals white, 3–5 × 1–1.5 mm, glabrous;

pollen ellipsoid.

horizontal to slightly descending, curved to straight, 3–8(–14) mm, glabrous or with some subappressed, branched trichomes.

suberect to divaricate-ascending, straight to slightly curved, 5–23 mm, glabrous.

horizontal to slightly descending, not appressed to rachis, secund, straight, edges parallel, 3–6 cm × 1.5–2 mm;

valves glabrous;

ovules 56–94 per ovary.

divaricate-ascending, not appressed to rachis, rarely somewhat secund, curved, edges parallel, (4–)6–11.7 cm × 1–2 mm;

valves glabrous;

ovules 50–80 per ovary;

style 0.1–0.7(–1) mm.

uniseriate, 1.2–1.5 × 1–1.3 mm;

wing continuous, 0.1–0.15 mm wide.

uniseriate, 1.2–2.2 × 0.8–1.4 mm;

wing continuous, 0.1–0.3 mm wide distally.

= 14.