Flora of North America species comparison

erect or ascending, sparsely pilose, glabrate.

erect or ascending, pilose.

sessile or petiolate;

petiole to 0.9 cm;

blade green, elliptic, oblong, oblanceolate, or linear, 3–10 × 0.5–1.2 cm, sparsely pilose.

sessile;

blade green, obovate to oblong or spatulate, 1.5–4 × 0.6–1.5 cm, apex rounded, pilose-sericeous abaxially.

heads white, globose, 0.8–1.3 mm diam., subtended by 2 leaves;

bractlets white, not crested.

heads white or pinkish, subglobose to short-cylindric, 10–12 mm diam.;

bractlets crested along keels.

tube densely lanose proximally;

perianth lobes white, oblong, 3.5–4 mm, hyaline, apex rounded to emarginate.

tube densely lanate;

perianth lobes stramineous, lanceolate, 4.5–4.7 mm, indurate, apex spinose-tipped.

1–1.5 mm.

subglobose to ovoid, 1.5–1.6 mm.

ovoid, 2.2 mm, apex acute.

ovoid, 2 mm, apex acute.