生活型

herb

形態特徵

• Annuals or perennials, often with elongated slender stolons.
• Culms tufted with fibrous roots only, capillary to filiform, 5-15 cm tall, 0.1-0.25 mm thick, finely channelled, green. Basal sheaths 0.5-1.7 cm long, membranaceous, pale, often reddish tinged at base, hyaline orifice obliquely truncate.
• Spikelet ovate to ovate-oblong, 3-5 mm long, 2-2.5 mm wide, subacute at apex, densely many-flowered, purplish red. Glumes elliptic, 1.3-1.5 mm long, obtuse at apex, thinly membranaceous, pale and tinged with purplish red, midvein green, rather broad.
• Achenes obovate-obdeltoid, 0.4-0.6 mm long, thickly biconvex, rounded-truncate at apex, maturing black, shiny, not cancellated; style 1.5 mm long, 2-cleft at apex, base depressed-conical, 1/4 its width of achene. Hypogynous bristles 4 or 5, slender, whitish, surpassing achene, sparsely spinulose.

分布

• 台灣 : Sporadically found in wet sandy ground especially near the seashore or along lakes.
• 世界 : Cosmopolitan.

引證標本

KAOHSIUNG: Kaohsiung, Shimada 4434.

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 255. 2000.  (Fl. Taiwan 2nd edit.)