生活型

herb

形態特徵

• Densely tufted annuals without rhizomes.
• Culms slender, erect, 5-30 cm tall, 0.5-0.8 mm thick, leaves basal, filiform, 4-10 cm long, glabrous to sparsely pilose on lower surface; sheaths pale brown. Involucral bracts 2 or 3, setaceous, 1-2.5 cm long.
• Inflorescence capitate, pale green to light brown. Spikelets 6 to 30, all sessile, lanceolate to ovate-lanceolate, 3-8 by 1-2 mm, apex acute.
• Glumes ovate, 1.7-2 mm long with a recurved short awn, keeled, ciliolate, occasionally puberulent apically. Stamen 1. Style base depressed globular. Achenes obovoid-orbicular, trigonous, 0.6-0.75 mm long, pale, obscurely tuberculate with transversely rectangular cells, rounded to apex.

分布

• 台灣 : cultivated fields, wasteland and sandy beaches.
• 世界 : Pantropical.

引證標本

KAOHSIUNG: Shanping, Kuoh 3995.

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 193. 2000.  (Fl. Taiwan 2nd edit.)