Spreading to erect annual c. 1 m high, monoecious. Branches quadrangular, almost glabrous. Lower leaves lanceolate, base cuneate, margin entire to deeply serrate, often hastate with forwardly directed lobes, 5–10 mm long, including petiole of c. 10 mm. Flowers mixed, spiciform, paniculate, the flower clusters at first continuous, later disjunct. Fruiting bracteoles deltoid, acute, 3–4 mm long and wide, united in lower half or free to base, entire or with 1 or 2 teeth, smooth or with warty protuberances, becoming black and thickened with age. Seeds of two types, brown and black, orbicular; radicle basal, horizontal.