Dioecious shrub, single- or (seldom) several-stemmed, ± erect, 1–3 m. tall. Stems mostly much-branched above, branches usually ± regular, paired, often ascending, glabrous to very shortly hairy. Leaves decussate, mostly pseudo-verticillate; blades 10–35 x (1)1.5–3.5 mm., (narrowly) oblanceolate, elliptic to ± linear-lanceolate, mostly glabrous; margins ± flat; petioles 0–1 mm. long; stipular sheath with 3–5(7,8) setae, the longest (0.5)0.7–4.5(5.6) mm. Flowers subsessile to shortly pedicellate (pedicels to 0.7 mm. in male), in clusters of many (very many: female) at nodes, inflorescences dimorphic, in female often quite contracted, dense, ± cylindrical inflorescence zones; corolla 4-merous, greenish-yellow to pale yellow, occasionally purplish ringed outside, mostly glabrous. Male: tube (0.5)0.7–1.2 mm. long, funnel-shaped, lobes (1.2)1.5–2.2(2.7) x (0.4)0.6–0.9(1.1) mm.; anthers 1–2 mm. long; small rudimentary ovary with 4 minute calyx lobes. 9: tube 0.2–0.5 mm. long, lobes 0.2–0.7 x 0.1–0.2 mm.; style 0–1 mm. long, stigmas 3–7.5(10) mm. long; ovary 0.6–1 x 0.3–0.6 mm., with 4 sometimes unequal calyx lobes. Fruit mostly reddish-brown, shiny; mericarps 1.5–2.7 x 0.7–1.2 mm., oblong, elliptic to ± obovate, glabrous or (seldom) ± sparsely shortly hairy, with 2 ± triangular calyx lobes (0.3)0.5–1(1.2) x 0.2–0.5 mm., one occasionally longer than the other.