Jointed Sedge is an erect clustered non rhizomatous
perennial herb, 25-35 cm tall; stem round, transversely septate,
hollow, smooth, hairless, green. Leaves are well developed in young
plants, when matures leaves are not seen and base of the stem covered
with 2-3 bladeless sheaths only; sheaths 2-3, upper ones 5-10 cm long,
cylindrical, mouth flat, lower sheaths reduced, 1-15 cm long. Flowers
are borne in a head, at the knee of the stem (inflorescence appear
above the water surface), 1-3 cm long and wide; bracts 1, erect,
continuous with the stem, much longer than the stem. Spikelets are
cylindrical, 8-15 x 3-4 mm, stalkless, oblong-pointed; rachilla
persistent, wingless. Jointed Sedge is found in India Africa and
Australia. Flowering: August-December.