Flora of North America species comparison

glabrous.

usually glabrous, sometimes sparsely, unevenly hairy.

1–(2–4).

usually multiple (branching and arching upward).

(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).

evenly distributed (proximal often smaller);

sessile or obscurely petiolate;

blades narrowly linear to filiform (or parted into linear-filiform lobes), 5–10 cm × 1–6 mm, bases ± linear, ultimate margins entire.

± 8 or ± 13;

corolla laminae 5–12 mm.

± 5 (± 13);

corolla laminae 8–12 mm.

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

usually ± 8, sometimes ± 13, (5–)6–9(–10) mm, tips green or minutely black.

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

0 or of 1–3+ (minute, inconspicuous) bractlets.

(1–)4–12 in corymbiform arrays.

10–20(–60) in compound corymbiform arrays (involucres cylindric or narrowly campanulate, 3–6 mm diam.).

glabrous.

usually hirtellous, sometimes glabrous.

= 40.

= 40.