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Glabrous, percurrent, often vigorous plants; internodes strongly compressed, to 8 cm long, some tending to be quadrangular or even 4-winged; lowest internodes of lateral shoots often keeled or more or less terete-quadrangular; basal cataphylls 1 pair, 0.3-0.5 cm above base, median in position, somewhat flaring when dry, rarely with a second pair somewhat higher. Leaf blade narrowly obovate to slightly spatulate, to 9(-13) x 3 cm, apex rounded, base tapering into 0.3-0.4(0.7) cm wide, flat, indistinct petiole, or somewhat amplexicaul; venation evident, of several basal, parallel veins nearly running into apex. Dioecious. Female inflorescence to 8.5 cm long, peduncle simple, 0.3-0.4 cm long, followed by about 6 fertile internodes; flowers 13-21 per fertile bract, 3-seriate. Fruit spherical, 0.2 x 0.2 cm, perianth segments closed.
