Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (0.6–)1–4.5 dm, densely pubescent proximally, trichomes short-stalked, 4–8-rayed, 0.1–0.4 mm, similarly pubescent distally.

usually 1 per plant, arising from center of rosette near ground surface, 4–10 dm, glabrous throughout.

blade linear to linear-oblanceolate, 2–4(–6) mm wide, margins entire, usually ciliate at petiole base, trichomes (simple or spurred), to 1.5 mm, surfaces densely pubescent, trichomes short-stalked, 4–8-rayed, 0.1–0.4 mm.

blade obovate to oblanceolate, 5–20 mm wide, margins dentate, not ciliate, surfaces glabrous or subapically puberulent, trichomes simple, 0.1–0.2 mm.

6–10, not concealing stem;

blade auricles absent, surfaces of distalmost leaves densely pubescent.

30–80, not concealing stem;

blade auricles absent, surfaces of distalmost leaves glabrous.

(5–)10–25-flowered, usually unbranched.

70–150-flowered, multi-branched.

divaricate at anthesis;

sepals pubescent;

petals light purple to lavender, 6–9 × 1.5–2.5 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals glabrous;

petals white, 2.8–4 × 0.6–1 mm, glabrous;

pollen ellipsoid.

reflexed, strongly curved at base, 2–10 mm, pubescent, trichomes appressed, branched.

divaricate-ascending to horizontal, straight or gently recurved, 6–15 mm, glabrous.

strongly reflexed, sometimes appressed to rachis, often secund, straight, edges parallel, (1.8–)2.5–4.5 cm × 5–8 mm;

valves glabrous;

ovules 24–62 per ovary;

style 0.2–0.6 mm.

divaricate-ascending to widely pendent, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 4.3–7.9 cm × 1.5–1.8 mm;

valves glabrous;

ovules 30–42 per ovary;

style 0.1–0.2 mm.

biseriate, 5–6 × 4–5 mm;

wing continuous, 1.8–2.5 mm wide.

uniseriate, 1.2–1.7 × 0.7–1 mm;

wing continuous or, sometimes, distal (rarely absent), 0.1–0.2 mm wide.

Jul–Sep.

barrens and wooded slopes of crumbling shale; of conservation concern; 100–500 m;

Va., W.Va.

= 14.

= 14.