Flora of North America species comparison

branched, pubescent, gland-dotted.

branched, pubescent.

mostly alternate, sometimes opposite;

petioles 0–5 mm;

blades 3-nerved from bases (venation raised, reticulate), elliptic to lanceolate or ovate to subdeltate, 20–70 × 7–20 mm, bases ± cuneate, margins crenate to serrate, apices acute, faces glandular-pubescent.

opposite or alternate;

petioles 3–20 mm;

blades 3-nerved from bases, deltate to lanceolate, 10–60 × 7–50 mm, bases cordate to truncate, margins crenate-dentate, apices acute, faces sparsely to densely pubescent, gland-dotted.

2–15 mm, tomentose, often gland-dotted.

20–50 mm, glandular-pubescent.

narrowly cylindric, 10–13 mm.

cylindric to broadly campanulate, 12–14 mm.

9–24;

corollas pale yellow-green, 6–8.2 mm.

± 60;

corollas pale yellow, often purple-tinged, 9–10 mm.

18–20 in 3–4(–5) series, green or purplish, 5–9-striate, unequal, margins scarious (apices acute, attenuate, obtuse, or nearly rounded);

outer ovate (lengths evenly grading to inner, margins ciliate, faces pubescent, often gland-dotted), inner narrowly lanceolate to linear-oblong (faces glabrous).

40–60 in 5–6 series, greenish, 4–6-striate, unequal, margins narrowly scarious (apices acute to acuminate);

outer narrowly lanceolate (glandular-pubescent), inner lanceolate (glabrous or tomentulose).

in paniculiform arrays.

borne singly or in open, paniculiform arrays.

2.5–4 mm, densely pubescent;

pappi of 32–43 white, mostly barbellate, sometimes subplumose, bristles.

4–5 mm, hispidulous or glabrate;

pappi of 32–36 white, barbellate bristles.