Robust annuals or perennials, sparingly branched. Leaves: blades lanceolate-linear, broad; ligule a fringe of hairs. Inflorescence axillary, a single subcylindric dorsiventral raceme with paired spikelets; internodes squatly clavate, shorter than spikelets. Sessile spikelet: callus truncate, with large central knob; lower glume oblong-ovate, crustaceous, smooth, pallid, narrowly winged on keels above; lower floret male, with palea; embryo 4/5 as long as caryopsis. Pedicelled spikelet well-developed; pedicel free, stout.
Species 3, tropical W Africa; sthn trop. Afr. 1: Chasmopodium purpurascens (Robyns) Clayton, Angola, Zambia.
Rottboellia L.f., in part; Robynsiochloa Jac.-F