Cyperus involucratus

風車草

naturalized

Cyperus involucratus Rottb.

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

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Rottb., Descriptiones Plantarum Rariorum 22. 1772. (Descr. Pl. Rar.)

Cyperus alternifolius L. var. flabelliformis (Bockeler) T. Koyama

Koyama, Quarterly journal of the Taiwan Museum 14: 177. 1961. (Quart. J. Taiwan Mus., 臺灣省博物館季刊)
Cyperus alternifolius L. ssp. flabelliformis (Rottb.) Kük.

Koyama, Flora of Taiwan 5: 270. 1978. (Fl. Taiwan, 台灣植物誌)
Cyperus alternifolius L.

Chen, The Invasive Alien Plant in Miaoli 290. 2006. (Invas. Al. Pl. Miaoli, 苗栗地區重要外來入侵植物圖鑑)

中

輪傘草. 傘草. 車輪草. 傘葉莎草. 輪傘莎草.
英

Umbrella papyrus. Umbrella palm. Palm crown. Umbrella flat sedge. Umbrella plant.
日

しゆろがやつり.

Wu, Yang, Teng, Chang, Yang and Hsieh, Taiwania 55(2): 156. 2010.
Shih-Huei Chen, Shu-Huei Weng and Ming-Jou Wu, Taiwania 53(3): 313. 2008.
Chen, The Invasive Alien Plant in Miaoli 290. 2006. (Invas. Al. Pl. Miaoli, 苗栗地區重要外來入侵植物圖鑑)
Yang, A list of plants in Taiwan . 1982. (List Pl. Taiwan, 台灣植物名彙)

herb

Tall perennial with short, woody rhizome.
Culms subdensely tufted, 50-150 cm tall, obtusely trigonous to nearly terete below, scabrous below corymb, clothed at base with bladeless sheaths only; basal sheaths pale green, 10-20 cm long, obliquely truncate at orifice, lower ones cataphylloid, yellowish brown.
Corymbs ample, subdense, 15-30 cm across, decompound; primary rays numerous slender, 7-10 cm long, each bearing 4-10 raylets 1-1.5 cm long; leafy bracts many, nearly equal in length, ca. twice as long as corymb, stiffish, flattish, 2-12 mm wide, sub-abruptly acute at apex. Spikelets clustered at apices of raylets, lanceolate-oblong to elliptic, flattened, 3-9 mm long, 1.7-3 mm wide, densely 6-30-flowered, light green; rachilla not winged.
Glumes ovate, acute at apex, ca. 2 mm long, membranaceous, palegreen and variegated with rusty brown, 3- or 5-nerved, keel prominent. Achenes obovate-elliptic, trigonous, 1/3 to 1/4 as long as glume, maturing brown; style nearly; as long as achene; stigmas 3, elongated. Stamens 3.