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Sometimes annual but probably often perennial much-branched prostrate or perhaps sometimes suberect subshrubby herb 30–40(?) cm. long; stems subangular, bifariously sparsely puberulous in narrow longitudinal grooves, otherwise glabrous.
Seeds dark purplish brown, 2.5 x 1.3 mm., compressed oblong-ovoid, very slightly widest at one end, with a fairly narrow groove beneath widened at one end containing some rhaphides and with a very reduced white proximal elaiosome.
Flowers in congested clusters c. 1 cm. wide at many if not most nodes, the upper 3 clusters condensed into a head or at least more approximate, the others well spaced.
Calyx tube 3 mm. long, the upper half pilose with erect hairs; lobes 2 (sometimes more?) 1.5–2.5 to 3.5 (in fruit) mm. long, narrowly oblong, ciliate.
Corolla white or greenish white; tube 3.5 mm. long, funnel-shaped, hairy within; lobes 3–4 x c. 1.2 mm., triangular-lanceolate, pubescent at apex.
Fruits 4.5 x 2.2 mm., oblong-ovoid, the valves opening widely.
Style exserted 4 mm., stigmatic club capitate-bilobed.
Filaments exserted about 3 mm..
