Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette, elevated on woody base or from ground surface, (2–)3–8 dm, densely pubescent proximally, trichomes short-stalked, 2-rayed and simple, to 1 mm, pubescent distally.

usually 1 per caudex branch, arising from center of rosette, often slightly elevated above ground surface on woody base, 2–5 dm, glabrous throughout.

blade linear to oblanceolate, 2–7(–12) mm wide, margins usually entire, rarely denticulate, ciliate along petiole, trichomes to 1.5 mm, surfaces densely pubescent, trichomes usually short-stalked, 2–5-rayed (rarely some simple), 0.4–0.8 mm.

blade oblanceolate, 5–12 mm wide, margins dentate, ciliate (at least proximally), trichomes (usually simple), 1–2 mm, surfaces moderately pubescent, trichomes short-stalked, 2–4-rayed, 0.4–0.6 mm.

10–30(–45), often concealing stem proximally;

blade auricles 2–5(–6) mm, surfaces of distalmost leaves pubescent.

5–12, often concealing stem proximally;

blade auricles 1–2 mm, surfaces distally glabrous.

12–50(–70)-flowered, usually unbranched.

10–35-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals purple, 9–14 × 2–4 mm, glabrous or sparsely pubescent (trichomes abaxially);

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals glabrous;

petals white to lavender, 5–8 × 1.5–2 mm, glabrous;

pollen ellipsoid.

usually divaricate-ascending, rarely horizontal, gently recurved or straight, 8–22 mm, pubescent, trichomes subappressed, 2–4-rayed.

horizontal to divaricate-ascending, curved or angled downward, 10–20 mm, glabrous.

usually divaricate-ascending, rarely horizontal, not appressed to rachis, not secund, usually curved, edges parallel, (6–)8–13 cm × 1.5–2.2 mm;

valves glabrous or trichomes relatively few, scattered;

ovules 90–250 per ovary;

style 0.01–0.5 mm.

widely pendent, not appressed to rachis, not secund, curved to nearly straight, edges parallel, 3.5–5 cm × 2.5–3 mm;

valves glabrous;

ovules 80–130 per ovary;

style 0.2–0.7 mm.

uniseriate or sub-biseriate, 1.5–1.7 × 1–1.2 mm;

wing continuous, 0.1–0.2 mm wide.

biseriate, 1.1–1.3 × 0.9–1 mm;

wing distal or continuous, 0.1–0.15 mm wide.