Flora of North America species comparison

1 to several per caudex branch, arising from center of rosette or arising laterally proximal to sterile shoots, somewhat elevated on woody base or from ground surface, 2–5(–9) dm, usually glabrous proximally, rarely sparsely pubescent, trichomes simple and short-stalked, 2- or 3-rayed, 0.1–0.5 mm, glabrous distally.

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

blade oblanceolate, (3–)5–15 mm wide, margins dentate, ciliate at least along petiole, trichomes to 1 mm, surfaces pubescent, trichomes short-stalked, 2–6-rayed, 0.1–0.5 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.

5–17(–21), sometimes concealing stem proximally;

blade auricles 0.5–3.5(–5.5) mm, surfaces of distalmost leaves glabrous.

30–80, not concealing stem;

blade auricles absent, surfaces of distalmost leaves glabrous.

10–30(–70)-flowered, usually unbranched.

70–150-flowered, multi-branched.

ascending at anthesis;

sepals glabrous;

petals lavender, 6.5–8.5 × 1–2.5 mm, glabrous;

pollen spheroid.

divaricate-ascending at anthesis;

sepals glabrous;

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

pollen ellipsoid.

horizontal, gently curved downward, 10–27 mm, glabrous.

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

widely pendent, not appressed to rachis, not secund, usually curved, edges parallel, 3–7 cm × 1.8–2.5 mm;

valves glabrous;

ovules 100–160 per ovary;

style 0.2–0.5 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.

sub-biseriate, 1.1–1.6 × 0.9–1.1 mm;

wing continuous, 0.1–0.2 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.