Flora of North America species comparison

glabrous or ± lanate-tomentose.

glabrous.

usually multiple (little branched, arching-erect).

1–(2–4).

± evenly distributed;

sessile or obscurely petiolate;

blades narrowly linear to filiform (or pinnatifid, the segments linear to filiform), 3–10(–12) cm, bases ± linear, ultimate margins entire or remotely toothed (fascicles of smaller leaves sometimes borne in axils of larger leaves).

(thickish-turgid) progressively reduced distally; petiolate;

blades broadly lanceolate to subelliptic, 2.5–15 × 1–5 cm, bases tapered, margins sharply dentate to subentire (some teeth callous; mid leaves sometimes larger than proximal; distal leaves sessile, smaller, often clasping).

usually ± 8 or ± 13, sometimes ± 21;

corolla laminae 10–15(–20) mm (mostly yellow, sometimes ochroleucous).

± 8 or ± 13;

corolla laminae 5–12 mm.

± 13 or ± 21+, 5–10(–12) mm, tips green or minutely black.

(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous).

usually of 3–5+ bractlets (lengths often to 1/2+ phyllaries), sometimes 0.

of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries).

(1–)3–10(–20+) in corymbiform or subcorymbiform clusters, often gathered in larger, showy arrays (involucres campanulate or cylindric).

(1–)4–12 in corymbiform arrays.

hairy.

glabrous.

= 40.

= 40.