Allied to S. falcatus, but clearly distinct by the following characters: Stems slender, 30-75 cm by 1½-2 mm. Leaves narrower, 2-4 mm wide at the base; basal sheaths brownish. Spikelets smaller, 4-6 by 1½-2 mm, with 1-4 fertile flowers. Glumes shorter, the flower-bearing ones 3-4(-5) mm long. Bristles absent. Anthers c. 2 mm long. Style 1½-2 mm, about as long as the stigmas. Nut distinctly asymmetric (abaxial angle straight, adaxial angles curved), smooth, shining milky white; epidermal cells minute, very indistinct, not pitted.
On Mt Victoria on rocks at the base of a waterfall, at 600 m, on Mt Kinabalu at 1500 m, near Kiabau on river-bank at 15 m.
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