Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (1–)2–6.3 dm, densely pubescent proximally, trichomes short-stalked, 3–8-rayed, 0.1–0.3(–0.5) mm, similarly pubescent distally.

usually 1 per caudex branch, arising from center of rosette, elevated above ground surface on woody base, (2–)3.5–13 dm, densely pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.3–0.9 mm, moderately to sparsely pubescent distally.

blade oblanceolate to linear-oblanceolate, 1.5–5 mm wide, margins usually dentate, not ciliate, surfaces densely pubescent, trichomes short-stalked, 5–12-rayed, 0.05–0.2 mm.

blade linear to oblanceolate, 3–10(–13) mm wide, margins entire or denticulate, ciliate along petiole, trichomes to 1.3 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.2–0.5 mm.

7–45(–65), concealing stem proximally;

blade auricles absent or 0.7–3 mm, surfaces of distalmost leaves pubescent.

12–35(–55), often concealing stem proximally;

blade auricles 1–5(–6) mm, surfaces of distalmost leaves pubescent.

10–40(–64)-flowered, usually unbranched.

30–120-flowered, usually unbranched.

ascending to descending at anthesis;

sepals pubescent;

petals white to lavender, 5–9 × 0.8–1.8 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals pubescent;

petals usually purple, rarely pinkish, 9–14 × 1.5–3 mm, glabrous or sparsely pubescent (trichomes scattered abaxially);

pollen spheroid.

pendent, recurved distal to horizontal to ascending base, 4–10 mm, pubescent, trichomes appressed, branched.

descending to horizontal, usually recurved, rarely straight, 4–20 mm, pubescent, trichomes appressed, 3–7-rayed.

closely pendent, rarely appressed to rachis, sometimes somewhat secund, usually straight, edges parallel, 3–6.5 cm × 1.9–2.2 mm;

valves pubescent throughout;

ovules 38–64 per ovary;

style 0.05–0.1 mm.

widely pendent, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, (6–)8–12 cm × 1.5–2.5 mm;

valves glabrous or trichomes sometimes scattered;

ovules 140–180 per ovary;

style 0.05–0.3 mm.

uniseriate, 1.4–1.8 × 1–1.4 mm;

wing continuous, 0.1–0.3 mm wide.

uniseriate or sub-biseriate, 1.7–2 × 1.2–1.7 mm;

wing continuous, 0.2–0.4 mm wide.

= 14.