Flora of North America species comparison

usually 3–7 per caudex branch, arising from margin of rosette near ground surface, 0.5–2.5 dm, usually sparsely pubescent proximally, rarely glabrous, trichomes short-stalked, 2- or 3-rayed, 0.06–0.2 mm, glabrous distally.

usually 1 per plant, arising from center of rosette near ground surface, (2–)3–7 dm, glabrous throughout, often glaucous.

blade narrowly oblanceolate, 2–4 mm wide, margins entire or somewhat dentate, ciliate near petiole base, trichomes (simple), to 0.5 mm, surfaces sparsely pubescent, trichomes short-stalked, 2–5-rayed, 0.1–0.25 mm.

blade oblanceolate to obovate, 4–10 mm wide, margins dentate, not ciliate, surfaces glabrous or sparsely pubescent subapically, trichomes simple, 0.3–0.8 mm.

3–7, not concealing stem;

blade auricles 0.5–1.5 mm, surfaces of distalmost leaves glabrous.

18–28, often concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves glabrous.

5–12-flowered, usually unbranched.

20–50-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals lavender, 5–7.5 × 0.8–1.5 mm, glabrous;

pollen spheroid.

ascending at anthesis;

sepals glabrous;

petals white, 3–5 × 0.5–0.7 mm, glabrous;

pollen ellipsoid.

divaricate-ascending, straight, 8–12 mm, glabrous.

ascending to divaricate-ascending, usually straight, 4–12 mm, glabrous.

usually divaricate-ascending, rarely nearly horizontal, not appressed to rachis, not secund, curved to straight, edges parallel, 3–4.7 cm × 1–1.5 mm;

valves glabrous;

ovules 64–86 per ovary;

style 0.2–0.5 mm.

divaricate-ascending, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 5–10 cm × 1.5–1.8 mm;

valves glabrous;

ovules 64–80 per ovary;

style 0.2–0.6 mm.

uniseriate, 1.1–1.3 × 0.8–1.1 mm;

wing continuous, 0.08–0.1 mm wide.

uniseriate, 1.5–1.8 × 1.2–1.4 mm;

wing continuous, 0.3–0.5 mm wide distally.