Erect, glabrous, annual, 20-60 cm tall, shortly branched or simple. Leaves 2-6 cm, broadly deltoid, petiolate, lobulate or erose, mucronulate, upper one deltoid-lanceolate; petiole 6-25 mm long. Cymes with short needle-like structures, shorter than the subtending leaves, c. 10 mm long and broad. Flowers perfect, c. 2 (-2.5-3) mm in diameter, green; perianth segments narrowly lanceolate, acute, subcarinate, herbaceous. Fruit a disciform utricle, depressed, circumscissile; seed horizontal with black, shining testa, exalbuminous with annular embryo.