| Biology : |
Perennial herb with culms at end of erect or creeping stolons 1 mm Ø; culms solitary or tufted, 10-30 cm long, c. 1 mm Ø, trigonous-terete, glabrous, smooth; leaves only in lower 3-8 cm of culm; upper sheaths green, lower straw-coloured to reddish-brown; blades flat, 4-10 cm long, 1-3 mm wide; inflorescence a solitary spike, 1,5-3 cm wide, of 3-30 spikelets; these sessile, contracted, ± linear, 10-18x1,7-2 mm, light yellowish-brown, somewhat flattened, 10-30-flowered; glumes ovate, 1,6-2 mm long, reddish-brown; nutlet obovoid, with a protuberance on each side so it is almost trigonous, 0,5-0,5 mm, blackish-brown. |
|
Cyperus subtrigonus (C.B. Clarke) Kük.
