Flora of North America species comparison

prostrate, villous.

ascending to spreading, often clambering, pubescent, glabrate.

sessile;

blade oval to obovate, usually as broad as long, 1.3–3 × 1.1–1.7 cm, apex rounded, pilose, glabrate.

sessile;

blade ovate to lanceolate or elliptic, 1.8–8 × 0.5–3 cm, herbaceous, apex long-acuminate or acute, sparsely strigose or glabrous.

axillary, sessile;

heads stramineous, globose to ovoid, 0.6–1 × 0.6–0.7 cm;

bracts equaling tepals, apex attenuate.

terminal and axillary, pedunculate;

heads yellowish white, subglobose to cylindric, 0.9–2.5(–4) × 0.9–1 cm;

bracts keeled, less than 1/2 as long as tepals.

tepals dimorphic, stramineous, lanceolate, 5–7 mm, apex acuminate, spinose tipped, sparsely villous, hairs barbed;

stamens 5;

anthers 3–5, globose;

pseudostaminodes triangular, shorter than filaments, margins dentate.

tepals monomorphic, green, lanceolate, 3.4–4.7 mm, apex acute, villous, hairs not barbed;

stamens 5;

pseudostaminodes ligulate, margins laciniate.

lenticular, 1.3–1.5 mm.

ovoid, 1.2–1.3 mm.

included within tepals, brown, compressed, 1.8 mm, apex truncate.

included within tepals, greenish yellow, ellipsoid, 2.5 mm, apex acute.