Novi Comme nt. Acad. Sci. Imp. Petrop. 16: 551. 1772.
Subshrubs, monoecious or dioecious, herbage densely tomentose, hairs stellate. Stems erect, not jointed or armed; basal branches woody, flowering branches herbaceous. Leaves alternate, petiolate; blade linear to narrowly lanceolate, not fleshy, base truncate, margins entire, revolute, apex blunt. Inflorescences axillary clusters or small spikes. Flowers unisexual; staminate flowers with bractlets absent, perianth 4-parted, stamens 4; pistillate flowers enclosed in 2 partially connate, slightly keeled, densely hirsute bractlets with free tips hornlike, perianth absent, stigmas 2, elongate. Fruiting structures ovate, flat utricles; pericarp free, thin. Seeds vertical, ovate; seed coat brown, covered with white hairs; embryo annular, perisperm copious. x = 9.
North America, Eurasia.
Species 3 (1 in the flora).