Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.8–6 dm, sparsely pubescent proximally, trichomes short-stalked and simple, (scattered), 2-rayed, 0.1–0.15 mm, glabrous distally.

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

blade oblanceolate, 4–10 mm wide, margins usually dentate, not ciliate, surfaces densely pubescent, trichomes short-stalked, 3- or 4-rayed, 0.1–0.2 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.

7–25, concealing stem proximally;

blade auricles 1–4 mm, surfaces of distalmost leaves glabrous.

18–28, often concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves glabrous.

6–20-flowered, usually unbranched.

20–50-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals dark reddish purple (drying indigo), 7–9 × 1.5–2 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals glabrous;

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

pollen ellipsoid.

ascending, usually straight, 5–10 mm, glabrous or pubescent, trichomes spreading, simple.

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

ascending, not appressed to rachis, not secund, curved or straight, edges parallel, (4–)6–12 cm × 1.7–2.2 mm;

valves glabrous;

ovules 80–100 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, 1.2–1.7 × 0.9–1.2 mm;

wing lateral and distal, 0.1–0.2 mm wide.

uniseriate, 1.5–1.8 × 1.2–1.4 mm;

wing continuous, 0.3–0.5 mm wide distally.