Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette, somewhat elevated on woody base or from ground surface, 0.6–3.5(–4.5) dm, densely pubescent proximally, trichomes long-stalked and simple, 2-rayed (sometimes all simple), 0.4–1 mm, sparsely pubescent or glabrous distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 2–8(–9.6) dm, densely pubescent proximally, trichomes simple and short-stalked, 2–4-rayed, to 1 mm, sparsely pubescent or glabrous distally.

blade oblanceolate, 3–7(–11) mm wide, margins entire or dentate, ciliate proximally, trichomes to 1 mm, surfaces densely pubescent, trichomes long-stalked, 2–4-rayed, 0.4–0.8 mm.

blade oblanceolate, 2–8(–11) mm wide, margins entire or denticulate, ciliate proximally, trichomes (simple), 0.5–1 mm, surfaces sparsely to densely pubescent, trichomes short-stalked, 2–4 (or 5)-rayed, 0.2–0.5 mm, these mixed with fewer simple ones.

5–15(–28), often concealing stem proximally;

blade auricles 0.5–3(–5) mm, surfaces of distalmost leaves pubescent.

7–33, often concealing stem proximally;

blade auricles 1–3 mm, surfaces of distalmost leaves sparsely pubescent or glabrous.

7–20(–30)-flowered, usually unbranched.

15–63-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals usually purple (rarely lavender), 7–12 × 2–4 mm, glabrous;

pollen ellipsoid.

divaricate to pendent at anthesis;

sepals pubescent;

petals white to lavender, 5–6 × 1–1.5 mm, glabrous;

pollen spheroid.

ascending to divaricate-ascending, straight, 3–25 mm, pubescent or glabrous, trichomes spreading, simple and 2-rayed.

reflexed, abruptly recurved near base, otherwise straight, 4–12 mm, sparsely pubescent or glabrous, trichomes spreading, simple and 2-rayed.

ascending to divaricate-ascending, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 3.5–10 cm × 1.5–2.2 mm;

valves usually glabrous, rarely sparsely pubescent;

ovules 48–96 per ovary;

style 0.05–0.3 mm.

reflexed to closely pendent, not appressed to rachis, not secund, straight or curved, edges parallel, (4.5–)5.5–8.5 cm × 1.5–2 mm;

valves glabrous;

ovules 70–110 per ovary;

style 0.05–0.4 mm.

uniseriate, 1.2–1.7 × 1–1.2 mm;

wing continuous, 0.1–0.2 mm wide distally.

uniseriate, 1.5–1.8 × 1.2–1.5 mm;

wing continuous, 0.15–0.3 mm wide.