Flora of North America species comparison

nearly always glaucous, glabrous.

arachno-tomentose to sericeous-lanate (especially on abaxial faces of phyllaries), unevenly glabrescent.

single or clustered.

single (turgid).

(thickish and turgid) progressively reduced distally;

petiolate;

blades ovate or obovate to lanceolate, 4–9(–15+) × 1.5–3(–4+) cm, bases tapered, margins wavy or subentire (often with callous denticles; mid and distal leaves sessile, bractlike).

evenly distributed (proximal withering before flowering);

subsessile or petiolate;

blades obovate to oblanceolate, 5–15(–25) × 2–6(–10) cm, bases tapered, margins serrate-dentate to denticulate or subentire (distal leaves slightly smaller).

8–10;

corolla laminae 4–10 mm.

usually ± 21, rarely 0;

corolla laminae 20–25 mm.

± 13 (± 21), 6–9 mm, tips green to brownish (not blackened).

± 21, 8–15 mm (sometimes purplish or pinkish-tinged), tips greenish.

of 1–3+ oblong to lance-linear bractlets (less than 3 mm).

of 6–10 linear bractlets (longest nearly equaling phyllaries).

(3–)8–24+ in corymbiform arrays.

1–5(–15+) in corymbiform arrays (involucres notably large, 20–40 mm diam.).

glabrous.

glabrous.

= 40.

= 40.