Perennial, more slender and shorter than the previous species, 80-120 cm high. Leaves narrow, not more than 4 mm broad, slender-semicylindric at the sheath, greatly overtopping the inflorescence, the blade convex on back; staminate and pistillate parts of the inflorescence separated, axis of staminal spike covered with hairs. Stamens 3; pollen free; pistillate flowers ebracteate, mixed with pistillodes, hairs much shorter than the stigma.