Erect or spreading annual herb up to 0.4–1.5 m tall, spreading to 2 m, glabrescent to moderately pubescent with eglandular appressed and spreading hairs.
Leaves solitary or occasionally paired; petiole 0.8–5 cm long, ± narrowly winged distally; lamina 4–15 × 2–7 cm, lanceolate to ovate-elliptic, base cuneate and attenuate into the petiole, apex acute to acuminate, usually entire, sometimes sinuate-dentate, sparsely pubescent or early glabrescent.
Branches slightly ridged, the ridges smooth or inconspicuously dentate.
Cymes lateral, unbranched, lax, extended, (6)8–12(16)-flowered; peduncles 10–30 mm long, erect; rhachis 3–10 mm long, up to 14 mm in fruit; pedicels 3–6 mm long in flower, up to 9 mm and usually reflexed in fruit.
Seeds 1.25–1.5 mm long, ± ovate in outline, pitted.
Fruits dark purple to black, 4–6 mm in diameter, globose, with small sclerotic granules.
Style 3–6 mm long, exserted 1–2 mm above the anthers and often geniculate.
Stamen filaments 0.5–1 mm long; anthers 1.5–2 mm long, oblong.
Corolla white, occasionally tinged purple, 3.5–5.5 mm across, stelliform; lobes 2–2.8 × 1.2–1.5 mm.