生活型

herb

形態特徵

• Small annual with fibrous roots only. Culms 5-15 cm tall, rather slender, triquetrous, smooth.
• Leaves few, shorter than to surpassing culm; blades narrowly linear, 1.5-2 mm wide, flattish.
• Corymbs, simple with 2-5 rays, occasionally contracted to a head-like cluster, rays 1-2 cm long, each bearing 10-30 spikelets; leafy bracts 3-5, surpassing corymb. Spikelets oblong to linear-oblong, 3-15 mm long, 1.5-2 mm wide, flattened, 8-40-flowered, greenish.
• Glumes subdensely disposed, ovate, 1.2 mm long, truncate at apex, membranaceous, pale, 3- or 5-nerved, greenish keel forming a mucro at glume apex. Achenes obovate to elliptic-obovate, flattened, 1/3-2/5 as long as glume, greyish brown, minutely puncticulate; style of medium length; stigmas 2. Stamens usually solitary.

分布

• 台灣 : Wet places.
• 世界 : India, Nepal, southeastern China, Indochina and Malesia.

引證標本

TAINAN: Wannaisho, Ito s. n. (KYO).

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 293. 2000.  (Fl. Taiwan 2nd edit.)