Flora of North America species comparison

(often purplish-tinged) glabrous or sparsely and unevenly hairy, especially near leaf axils and among heads, usually glabrescent.

glabrous or sparsely and unevenly tomentose when young.

single or loosely clustered.

usually 1.

usually progressively reduced distally (basal sometimes smaller than proximal or mid leaves); petiolate (petioles shorter than to equaling blades, often clasping);

blades broadly lanceolate or lanceolate to oblanceolate, (5–)10–20+ × 2–4(–5+) cm, bases tapered, margins dentate to denticulate (distal leaves smaller, bractlike).

evenly distributed; petiolate;

blades ovate to oblanceolate, 2–10 × 0.5–2(–4) cm, bases tapered, margins lobulate to dentate, ultimate margins often secondarily dentate to denticulate (distal leaves sessile).

usually ± 13, sometimes fewer;

corolla laminae (10–)15–25 mm.

0.

± 13 or ± 21, tips often black or brownish (sometimes with scattered black hairs).

± 21, 4–6 mm, tips usually green, sometimes black.

of 2–5+ linear to filiform bractlets (lengths to 1/2 phyllaries).

of 2–4(–6+) bractlets (prominent, black-tipped, lengths about 1/4 phyllaries).

nodding, 1–5(–10).

8–20 in loose, corymbiform arrays.

glabrous.

usually sparsely hairy, sometimes nearly glabrous.

= 40, ca. 175–180.

= 40.