Taxon 31: 113. 1982.
Plants perennial or occasionally annual, 3–20 dm. Stems mostly prostrate with ascending branches, much-branched, glabrous. Leaf blades linear to linear lanceolate or oblanceolate, 15–55 × 2–12 mm. Inflorescences: heads white or pinkish (drying silvery white), globose or cylindric, 7–30 × 7–10 mm; bracteoles slightly shorter than flowers. Flowers very short-pedicellate; tepals connate basally, white, oblong, dorsiventrally compressed, thickened basally, 3–5 mm, chartaceous, apex of outer tepals obtuse, apex of inner tepals acute, spinose-tipped, densely villose. Utricles indehiscent or splitting irregularly, included in tepals, 1.3 mm. Seeds 0.8–1 mm.
Phenology: Flowering year-round.
Habitat: Saline soils, sands of beaches, dunes, sand bars
Elevation: 0-10 m
Fla., La., Tex., Mexico, Central America.