glabrous; rhizome woody; stems 12–20 in. long, rather slender, trigonous at the top; leaves often nearly as long as the stem, 1/5 in broad, more or less 3-nerved; umbel lax, compound, 3–8 in. in diam., irregular, sometimes proliferous; bracts about 8, somewhat overtopping the umbel, similar to the leaves; spikelets mostly solitary, pedicelled, 1/4 by 1/12 in. compressed, 8–14-flowered, greenish, ultimately dirty straw-coloured; glumes boat-shaped, obscurely 3-nerved, green on the back, keel subexcurrent in a mucro, margins broadly scarious not scabrous on the edge; stamens 3; anthers linear-oblong, hardly crested; nut 3/4 the length of the glume, ellipsoid, trigonous, brown; style 1/3 the length of the nut, branches 3 shortish. null