Flora of North America species comparison

closely, unevenly lanate-floccose, glabrescent.

glabrous or with tufts of white hairs in leaf axils.

usually multiple (strict or nearly so, arching-erect).

usually 1 (branching distally, unevenly reddish, usually somewhat lax).

(often recurved and thickish-turgid) concentrated distally on stems;

sessile or obscurely petiolate;

blades narrowly linear to filiform (2–7 cm × 1 mm), bases ± linear, margins entire.

evenly distributed;

petiolate (proximal) or sessile;

blades lanceolate to lance-linear, 3–10+ × (0.5–)1–2 cm, bases tapered (or auriculate), margins (sometimes revolute) unevenly dentate to subentire (mid and distal leaves similar, smaller, bases expanded, ± truncate to cordate, clasping).

usually ± 8, rarely 0;

corolla laminae 5–10 mm.

usually ± 8 or ± 13, rarely 0;

corolla laminae 8–10 mm.

± 13, 5–8 mm, tips green or minutely black.

± 21, (4–)5–8 mm, tips often with minute black dots.

0 or of 3–5 bractlets (lengths less than 1/2 phyllaries).

of 3–5+ linear to subulate bractlets (to 1.5 mm).

3–10 in corymbiform arrays (involucres weakly campanulate).

4–12 in loose, corymbiform arrays.

glabrous.

hairy.