Flora of North America species comparison

procumbent, pubescent in lines, glabrate.

erect, villous, glabrate.

sessile;

blade elliptic to oblong or oblanceolate, 1.2–5 × 0.5–2.2 cm, apex obtuse to acute, glabrous.

sessile;

blade ovate to lanceolate, 1–7 × 0.7–1 cm, herbaceous, villous.

axillary, sessile;

heads white, subglobose or ovoid, 0.5–1.1 cm;

bracts keeled, ca. 1/2 as long as tepals.

terminal and axillary, pedunculate;

heads white, globose, 0.7–1 cm diam.;

bracts keeled, shorter than to equaling tepals.

tepals white, ovate to lanceolate, 2–3.5 mm, apex acuminate, hairs not barbed;

stamens 5;

anthers 3–5, globose;

pseudostaminodes subulate, margins laciniate.

tepals monomorphic, green to stramineous, lanceolate, 3–4 mm, apex acuminate, villous, hairs not barbed;

stamens 5;

pseudostaminodes ligulate, margins fimbriate.

lenticular, 0.9–1.1 mm.

ovoid-oblong, 1.4 mm.

included within tepals, sides exerted in mature fruit, greenish stramineous, obcordate, 1.3–1.7 mm, apex retuse.

included within tepals, brown, ellipsoid, 2 mm, apex acute.