Leaves linear, opposite or in whorls. Peduncle of the inflorescence 1-1.5 mm long. Male and female flowers subsessile; pedicels 0.5-1 mm. style very short in flower, 2-2.5 mm in fruit; stigma peltate, wavy; achenes 2-5, stalked; stalk 1-1.5 mm long, back of the achene curved and dentate.