生活型

herb

形態特徵

• Culms densely tufted in clumps, 7-30 cm tall, 0.2-0.4 mm thick, filiform, not soft, pale or slightly glaucous-green, obscurely few-costate.
• Basal sheaths 0.5-3 cm long, pale-green, often tinged with redbrown on lower part, transversely truncate at non-hyaline orifice.
• Spikelets ovoid-globose to ovoidellipsoid, 3-7 mm long, 3-4 mm wide, rounded at base, very obtuse at apex, reddish ferrugineous or light ferrugineous, densely many-flowered.
• Glumes patent, broadly elliptic to ovate-oval, 2 mm long, obtuse at apex, membranaceous, pale brown, green midvein ending below glume apex. Achenes broadly obovate, 1 mm long, thickly biconvex, maturing black, shiny, not cancellated, suddenly contracted to apex; style 1.5-1.7 mm long, 2-cleft at apex, base depressed-conical, 1/3 its width of achene. Hypogynous bristles 6 or 7, ferrugineous, slightly longer than achene body, retrorsely, spinulose.

分布

• 台灣 : In wet soil, frequently seen in wet sandy openings near the seashore.
• 世界 : Pantropic.

引證標本

HSINCHU: Senchiauseh, Simada 4257. TAINAN: Haikou, Ashiri s. n. 1933. PENGHU: Huang & Kao 6878. PINGTUNG: Matuda 393; Oluanpi, Kudo & Mori 16147.

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 259. 2000.  (Fl. Taiwan 2nd edit.)