生活型

herb

形態特徵

• Coarse perennial, tufted with short rhizome. Culms robust, 40-110 cm tall, 3-5 mm thick, obtusely trigonous, minutely granulate, glaucous green.
• Leaves rather many, mostly surpassing culms; blades linear, 8-12 mm wide,coriaceous, plicate below middle, flattish to incurved-margined above middle, glaucous-green and often whitish powdery, separate-nodulose, prominently scabrous on margins; sheaths dark brown or purplish brown, cylindrical, septate-nodulose.
• Corymbs compound to decompound, ample, 10-15 cm long; primary rays 6-10, to 12 cm long, patent, subrigid; secondary corymbs with 3-6 raylets; spikes cylindrical to oblong, 1.5-3 cm long, 8-12 mm wide, bearing many spikelets; leafy bracts 5 or 6, lower ones much surpassing corymb. Spikelets divergent to slightly reflexed, lanceolate to oblong-lanceolate, 4.5-6 mm long, 1.8-2 mm wide, turgid, 4-6-flowered, grayish brown and whitish powdery; rachilla rather broadly winged, jointed above prophyll.
• Glumes broadly ovate, suddenly acuminate at apex, 3 mm long, subcoriaceous, brownish with rusty lineolae, margins whitish hyaline, many-nerved; keel hardly ridged, forming an obtuse back. Achenes oval to obovate, trigonous, ca. 1/2 as long as glume, black-brown at maturity, minutely puncticulate; style elongated; stigmas 3. Stamens 3.

分布

• 台灣 : Saline swamps near the sea.
• 世界 : Tropical Africa, Indian subcontinent, Indochina, Malesia, south China, Hawaiian Islands.

引證標本

ILAN: Kueishan Is., Masamune & Suzuki s. n. 3 Jul 1939. TAINAN: Anping, Suzuki s. n. 3 Nov 1934. KAOHSIUNG: Kaohsiung, Faurie 78 (KYO, P). PINGTUNG: Pingtung, Hsu 13551; Hengchun, Wang 12723. TAITUNG: Lanyu Is., Kuoh 4816, Moo 2366, Sasaki s. n. May 1924, Masamune 4127.

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 290. 2000.  (Fl. Taiwan 2nd edit.)