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 near ground surface, (1.5–)3–9 dm, glabrous or pubescent proximally, trichomes sessile, 2–4-rayed (some simple), to 0.7 mm, glabrous 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 oblanceolate, 2–10 mm wide, margins usually entire, rarely denticulate, ciliate along petiole, trichomes (simple), to 0.8 mm, surfaces sparsely to densely pubescent, trichomes sessile, 2–6-rayed, 0.1–0.4 mm.

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

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

(10–)15–56, concealing stem proximally;

blade auricles 1–5 mm, surfaces of distalmost leaves glabrous.

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

12–40(–65)-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 glabrous or with scattered trichomes;

petals usually purple, rarely lavender, 6–9 × 1.5–3 mm, glabrous;

pollen spheroid.

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

divaricate-ascending to horizontal, straight, 5–12 mm, glabrous.

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.

divaricate-ascending to horizontal, not appressed to rachis, not secund, straight, edges parallel, (4.5–)5.5–11 cm × 1.7–2.5 mm;

valves glabrous;

ovules 114–142 per ovary;

style 0.05–0.2 mm.

uniseriate, 1.4–1.8 × 1–1.4 mm;

wing continuous, 0.1–0.3 mm wide.

uniseriate to sub-biseriate, 1.4–2 × 1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.

= 14.

= 21.