Flora of North America species comparison

prostrate, forming mats, often fistulose, glabrous.

procumbent or prostrate, glabrous.

sessile;

blade narrowly elliptic, elliptic, or oblanceolate, 3.5–7.1 × 0.5–2 cm, herbaceous, apex acute to obtuse, glabrous.

sessile;

blade oblong, oblanceolate, obovate, or oval, 2–6 × 0.8–3 cm, succulent, apex obtuse to acute, mucronate, glabrous.

terminal and axillary, pedunculate;

heads white, globose, 1.4–1.7 cm diam.;

bracts not keeled, less than 1/2 as long as tepals.

axillary, sessile;

heads white to stramineous, globose to ovoid, 0.6–1 × 0.6–0.8 cm;

bracts about 1/2 as long as tepals.

tepals monomorphic, white, lanceolate or oblong, 6 mm, apex acute, glabrous;

stamens 5;

pseudostaminodes ligulate.

tepals monomorphic, stramineous, striate, lanceolate, 4–5 mm, rigid margins coriaceous, apex acuminate, glabrous;

stamens 5;

anthers 5, oblong;

pseudostaminodes lanceolate, equaling or exceeding filaments, margins fimbriate.

not seen.

subglobose, 1.5 mm.

not seen.

included within tepals, stramineous, subglobose, ca. 1.5 mm, apex acute.