*Isolepis prolifera (Rottb.) R.Br.

Inflorescence apparently terminal. Stamens usually 3. Spikelets often numerous, only very rarely reduced to 1. Nut acutely 3-angular, smooth or minutely granular. Leaves reduced to a sheath with a very short lamina. Plants up to 40 cm high, weak, rhizomatous. Widespread. Wet places. Introd. from S. Africa