Herbs annual. Stem erect, much branched, glabrous or arachnoid hairy. Leaves alternate, sessile, terete, fleshy, base expanded, apex obtuse or aristate awned; leaf axil fascicular pilose. Flowers borne in axillary glomerules, bisexual and female (plants polygamous), with 2 bractlets. Perianth conic, 5-parted; segments lanceolate or broadly so, in fruit with a membranous wing near apex abaxially. Stamens 2 or 5; anthers oblong, without an appendage. Ovary ovoid, laterally compressed; style short; stigmas 2, filiform. Fruit a utricle, enclosed by perianth; pericarp membranous, adnate to seed. Seed vertical or horizontal, orbicular; testa membranous or subleathery; embryo spiral; perisperm absent.
Herbs, annual, polygamous, herbage glaucous, glabrous except for axillary tufts of long white hairs. Stems erect or spreading, much-branched, not jointed, not armed, somewhat fleshy. Leaves alternate, sessile, ± succulent; blade terete, narrowly oblong, base expanded, clasping, apex obtuse with caducous, flexible bristle. Inflorescences axillary glomerules; bracts leaflike. Flowers bisexual and unisexual; perianth persistent, deeply 5-parted, not imbricate, apically winged, some with flabellate blade, often indurate; stamens 5 or fewer; stigmas 2. Fruits utricles, orbiculate; pericarp somewhat adherent to seed. Seeds vertical, orbiculate, flattened; seed coat brown or brownish black; perisperm absent. x = 9.
|(Greek halos, salt, and geiton, neighbor, in reference to the habitat of the species)|