Cyperus sesquiflorus subsp. cylindricus

圓筒穗水蜈蚣

Cyperus sesquiflorus (Torr.) Mattf. & Kük subsp. cylindricus (Nees ex Wight) T. Koyama

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

Koyama. 1970. Bot. Mag. (Tokyo) 83: 187.

同發表文獻

Kyllinga cylindrica Nees

Ohwi. 1944. Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 18: 163. (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
Kyllinga sesquiflora Torr. subsp. cylindrica (Nees) T. Koyama

Koyama. 1978. Flora of Taiwan 5: 288. (Fl. Taiwan)
Kyllinga sesquiflora (Torr.) Mattf. &Kükenthal var. subtriceps (Nees) T. Koyama

Koyama. 1961. Quarterly journal of the Taiwan Museum 14: 191. (Quart. J. Taiwan Mus.)

Yang. 1982. A list of plants in Taiwan. (List Pl. Taiwan)
Larridon, I.,...Baker, W. J. 2021. Journal of Systematics and Evolution 59(4): 852-895.

herb

Perennial, tufted with short rhizome clothed with brown fibers, not stoloniferous. Culms slender, erect, 10-32 cm tall, triquetrous, smooth.
Leaves few to a culm, shorter than culm; blades narrowly linear, 2-4 mm wide, subrigid, flattish plicate; sheaths pale-brownish.
Inflorescence a head with 1-3 spikes, 1-1.2 cm long, ca. 1 cm wide, whitish green; central spike cylindrical 1-1.2 cm wide, 4-5 mm wide; lateral spikes elliptic, much shorter than central spike, each densely bearing many spikelets; leafy bracts 3 to 5, reflexed, lowest to 10 cm long. Spikelets patent, elliptic to ovate-elliptic, flattened, 2-2.5 mm long, 1-1.3 mm wide, 1- or 2-flowered, 1-fruited.
glumes broadly ovate, membranaceous, folded with green keel, apiculate at apex, lower two ca. 2 mm long, 9- or 11-nerved, upper two 2.5 mm long, 5- or 7-nerved. Achenes elliptic-obovate or obovate-oval, laterally flattened, maturing dark brown; stigmas 2. Stamens 2.