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Rhynchospora rugosa ssp. brownii

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Rhynchospora rugosa (Vahl) Gale ssp. brownii (Romer & Schult.) T. Koyama
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名彙資訊

學名發表文獻

Koyama, Enumeration of the Flowering Plants of Nepal 1: 118. 1978.  (Enum. Fl. Pl. Nepal)

台灣首次記錄發表文獻

Koyama, Flora of Taiwan 5: 299. 1978.  (Fl. Taiwan, 台灣植物誌)

異名

  • Rhynchospora brownii Romer & Schultes
    Ohwi, Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 18: 20. 1944.  (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
  • Rhynchospora rugosa (Vahl) Gale var. condensata (Kükenthal) T. Koyama
    Koyama, Journal of the Faculty of Science, Imperial University of Tokyo. Section III, Botany 8(3): 130. 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)

各語言俗名

  • とらのはなひげ.

參考資料

  • Yang, A list of plants in Taiwan . 1982.  (List Pl. Taiwan, 台灣植物名彙)

特徵描述

生活型

herb

形態特徵

  • Subloosely tufted perennial with very short rhizome. Culms erect, 50-70 cm tall, slender, fewnodose, obtusely angular, smoothish.
  • Leaves basal and few upper cauline and spaced, narrowly linear, 1.5-2.5 mm wide, subrigid, canaliculate to flattish, scabrid on mid-vein and along margins, gradually acute at apex; sheaths tightly surround.ing culm; ligule nearly wanting.
  • Corymbs 2 or 3, as a rule solitary, rather spaced, branches slender, 2 to 4 cm long, more or less curved, subdensely to densely manyspiculose; bracteoles setaceous to scale-like. Spikelets lanceolate-ovate to ovate-elliptic, 3-4.5 mm long, weakly obcompressed, acute at apex, dark brown, 3 or 4-flowered, 1- or 2-fruited; glumes 6 or 7, ovate to broadly ovate, thinly chartaceous, 1-costate, contracted above to sharp, mucronate apex.
  • Achenes broadly obovate, 2 mm long, biconvexed, subacute on edges, maturing brown, weakly transversely wrinkled with longitudinally oblong epidermal cells; base of style conical, ca. 1 mm long, tapering above to subobtuse apex; style filiform, 2-cleft. Hypogynous bristles 6, occasionally 7, slightly shorter than achene, filiform, brownish, upwardly scabrous.

分布

  • 台灣 : Wet grasslands and marshes.
  • 世界 : As species widely spread into tropical and subtropical regions of both hemispheres. In eastern Asia range of subsp. <i>brownii</i> extends from India through southern continental China northeastwards to central Japan.

引證標本

TAIPEI: Peitou, Simada s. n. 1915. NANTOU: Sun Moon Lake, Kudo & Sasaki. 15628. TAITUNG: Pianan Pass, Fukuyama 4056.

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    島田彌市 Yaichi Shimada
    台北 Taipei

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