Leaf scars closed. Leaves 2-4 mm wide; leaf sheath narrow, persistent, forming a scarious mass at the base of each shoot; nerves 9-15; leaf tip rounded to emarginate, faintly serrulate. Fruit semicircular, with dentate dorsal ridges
Leaf scars open. Leaves 4-9 mm wide; leaf sheaths broad-triangular, not persistent; nerves 13-17; leaf tip obtuse, densely set with triangular teeth. Fruit elliptic, with 3 smooth dorsal ridges
