Schoenoplectus supinus ssp. lateriflorus

小水莞

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

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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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

Hayata, Icones Plantarum Formosanarum 6: 114. fig. 31. 1916. (Icon. Pl. Formos., 台灣植物圖譜)
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

日

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.