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Schoenoplectus supinus ssp. lateriflorus

小水莞

Schoenoplectus supinus Palla ssp. lateriflorus (J. F. Gmel.) Soják
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名彙資訊

學名發表文獻

Soják, Cas. Nár. Mus., Odd. Prír. 141: 62. 1972.

台灣首次記錄發表文獻

Koyama, Flora of Taiwan 5: 303. 1978.  (Fl. Taiwan, 台灣植物誌)

異名

  • Scirpus erecto-gracilis Hayata
  • Scirpus oryzetorum (Steudel) Ohwi
    Ohwi, Memoirs of the College of Science, Kyoto Imperial University. Series B. Biology 18: 112. 1944.  (Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol.)
  • Scirpus supinus L. var. lateriflorus (J. F. Gmel.) T. Koyama
    Koyama, Journal of the Faculty of Science, Imperial University of Tokyo. Section III, Botany 7(6): 302. fig. 6 C-D. 1958.  (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

  • ほそがたほたるすげ.

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

  • Tufted in small clumps with fibrous roots. Culms slender, 7-30 cm tall, 1-1.7 mm thick, trigonous, greenish, clothed at base with 2 or 3 sheaths only.
  • Sheaths 5-15 cm long, membranaceous, pale green, orifice obliquely truncate with a mucro 2-4 mm long, frequently uppermost sheath borne 1-2 cm above base of culm, this sometimes developing a compressed, triangular blade to 10 cm long.
  • Inflorescence pseudo-lateral, head-like or corymbose with to 4 short (0.5-3 cm long) rays; bract(s) 1 or 2, first bract erect, 3-12 cm long, ventrally sulcate, second bract, when present, patent, 2-4 cm long. Spikelets 3 to 20 to an inflorescence, wholly congested or clustered in groups of 2 to 7 at apices of rays, lanceolate-ovate to oblong, 4-8 mm long, 2-3 mm wide, pale-green and becoming light straw colored, subdensely manyflowered, subacute at apex.
  • Glumes elliptic, 1.8-2.5 mm long, boat shaped with a prominent, green, 3-nerved keel, both sides membranaceous, pale with often sanguineous spots, contracted above to mucronate apex. Achenes broadly obovate, 1-1.3 mm long, truly triangular, suddenly contracted at both ends, mucronate at apex, sides transversely wrinkled, maturing black; style 1.5 cm long, 3-cleft at apex. Hypogynous bristles 0, rarely rudimentally.

分布

  • 台灣 : Wet places, frequently in rice fields.
  • 世界 : Tropical and subtropical Asia and Australia.

引證標本

MIAOLI: Chunan, Shimada 683. PINGTUNG: Ako, Nakahara 510 (TI, type of S. erecto-gracilis; Manchou, Hsu 13072*. Shimotamsui, Shimada (KYO) KAOHSIUNG: Kaohsiung, Shimada 4471. Rokki in Kaohsiung Hsien. Okamoto.

引用文獻

典藏標本

共有 6 份典藏標本

    257380
    許天詮 Tian-Chuan Hsu
    屏東 Pingtung
    251516
    陳奐宇 Huan-Yu Chen
    宜蘭 Ilan
    155480
    C.C.Hsu
    屏東 Pingtung
    147022
    許建昌 Chien-Chang Hsu
    屏東 Pingtung
    026312
    Yaiti Simada
    苗栗 Miaoli
    218008
    島田彌市 Y.Shimada
    新竹 Hsinchu

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