Fimbristylis umbellaris

繖形飄拂草

Fimbristylis umbellaris (Lam.) Vahl

名彙資訊

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Vahl, Enumeratio Plantarum 2: 291. 1805. (Enum. Pl.)

Fimbristylis hypsocolea Hosokawa

Hosokawa, Transactions of the Natural History Society of Formosa 28: 152. 1938. (Trans. Nat. Hist. Soc. Formos., 台灣博物學會會報)
Fimbristylis globulosa (Retz.) Kunth var. austrojaponica Ohwi

Ohwi, Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 18: 71. 1944. (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
Fimbristylis globulosa (Retz.) Kunth

Koyama, Journal of the Faculty of Science, Imperial University of Tokyo. Section III, Botany 8(3): 109. 1961. (J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot., 東京帝國大學理學部紀要, 第三類, 植物學)

無

herb

Perennial with short, horizontal rhizome, clothed with brownish scales; culms densely tufted, obtusely trigonous, 20-90 cm by 1-5 mm, smooth, glabrous, light green, clothed at base with 2 or 3 bladeless sheaths.
Leaves cauline reduced to bladeless sheath, sterile shoot ones usually short-bladed; sheaths cylindrical, 2-18 cm long, obliquely truncate at orifice; balde linear when well-developed, 7-25 cm by 1.5-2 mm; ligule absent.
Inflorescence simple to compound, 2-10 cm by 1.5-7 cm; involucre 2-3, narrowly lanceolate, margins scarious, longest 0.5-1 cm long; primary branche 2-10, unequal, 1-5 cm long. Spikelets 3-40 per inflorescence, solitary, broadly ovate to broadly elliptic, 3-8 mm by 3-4 mm wide, obtuse, terete, densely many-flowered.
Glumes many per spikelet, spiral, ovate to ovate-elliptic, 1.8-2.7 mm by 1-1.5 mm, obtuse to mucronate, membranaceous, yellow- or rusty-brown, scarcely keeled, 3-nerved in center. Stamens 2-3; anthers c. 0.5 mm long. Style triquetrous or trifid, glabrous, dilated at base; stigmas 3, rarely 2. Achenes obovate or obovate-orbicular, 0.8-1 mm by 0.5-0.7 mm, shortly stiputate, maturing milky-yellow, obscurely cancellated with transversely oblong cells, rarely sparsely verruculose.