Stolon 1/8 in. in diam., covered by scales scarcely 1/4 in. long. Stem 16 in. long, rather stout, acutely and equally triquetrous at the top. Leaves as long as the stem, 1/3 in. broad, flat, 3-nerved. Head 1, very dense, of 50 spikelets; bracts 4–5, lowest up to 1 ft. long, similar to the leaves. Spikelets 2/5 by 1/6 in., moderately compressed, 10–16-flowered, pale brown or cinnamon-coloured. Glumes ovate, boat-shaped, very close-packed on the rhachilla, much imbricated in ripe fruit, tip narrow-triangular, hardly acute, nerves many, margins very minutely hairy. Stamens 3; connective not produced. Style short; branches 3, long. Nut 1/2 the length of the glume, trigonous, shining-brown.