Flora of North America species comparison

1–several, ascending or decumbent, often branched distally, 3–10 dm, sericeous-tomentose with white hairs.

usually crowded at base, few on stems, sessile or short-petiolate;

blade lanceolate, proximal leaves 3–12 × 0.5–2.5 cm, base attenuate, apex acute or rarely obtuse, scaberulous or canescent adaxially, sericeous-tomentose with bright whitish hairs abaxially.

dense, stout, flowers arranged in 3-ranked spiral;

bracteoles dark, glabrous.

(3.5–)4–5.5 mm;

perianth lobes narrowly oblong, apex obtuse, or acutish, pubescence dense, bright white;

filament lobes stramineous or darkened, blunt.

narrowly or broadly winged laterally, 2.5–5.5 × 3–4.5 mm, longer than broad, wing margins irregularly dentate, 1 or both surfaces of perianth with 1 or more basal tubercles or spines.