渐尖穗荸荠Heleocharis attenuata (Franch. et Savat.) Palla
渐尖穗荸荠Heleocharis attenuata (Franch. et Savat.) Palla
15．渐尖穗荸荠
Heleocharis attenuata (Franch. et Savat.) Palla in Monde des plantes XII (1910) 40; Hara in Journ. Jap. Bot. XIX (1943) 153, XX (1944) 333 et XXXII (1957) 140 ——Scirpus attenuatus Franch. et Savat. , Enum. Pl. Jap. II (1876) 110 et (1877) 543 ——Heleocharis (§Intermediae) major Hara in Jour. Jap. Bot. XI (1935) 820, f. 24——H. laeviseta Nakai var. major (Hara) Hara l. c. XIV (1938) 224.
《Flora of China》 Vol. 23 (2010)
Eleocharis attenuata (Franchet & Savatier) Palla Monde Pl. 12: 40. 1910.
渐尖穗荸荠 jian jian sui bi qi
Perennials. Rhizomes decumbent or absent. Culms ± laxly to densely tufted, 20-50 cm tall or ± short, ca. 1 mm thick, terete, longitudinally sulcate. Leaf sheaths 2, basally blood-red to pale blood-red and apically pale brownish yellow, 2.5-7 cm, mouth truncate, apex shortly aristate to mucronate. Spikelet ovoid, narrowly ovoid, or ellipsoid-ovoid, 6-10 × ca. 3 mm or longer, densely many flowered, apex acute to obtuse. Basalmost glume empty, amplexicaul for whole spikelet base; fertile glumes pale to slightly rust-colored, tightly imbricate, oblong to suboblong, ca. 2.2 × 1 mm, margin hyaline, apex rounded. Perianth bristles 6, rust-colored, as long as nutlet or slightly shorter, densely to laxly retrorsely shortly spinulose. Stigmas 3. Nutlet dark yellow, obovoid, ca. 1.2 × 0.7 mm, 3-sided, sides convex, smooth; persistent style base depressed deltoid-pyramidal, 1/4-1/3 (to nearly 1/2) as long as nutlet, base cup-shaped and slightly narrower to as wide as nutlet, margin basally slightly involute, apex acute. Fl. and fr. May-Sep.
Paddy fields, pond margins, riverbanks, moist soil; 100-600 m. Anhui, Fujian, Guangxi, Henan, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Zhejiang [Japan, S Korea, Papua New Guinea, Russia (Far East), Vietnam].
科名：莎草科 Cyperaceae
属名：荸荠属 Heleocharis
15．渐尖穗荸荠
Heleocharis attenuata (Franch. et Savat.) Palla in Monde des plantes XII (1910) 40; Hara in Journ. Jap. Bot. XIX (1943) 153, XX (1944) 333 et XXXII (1957) 140 ——Scirpus attenuatus Franch. et Savat. , Enum. Pl. Jap. II (1876) 110 et (1877) 543 ——Heleocharis (§Intermediae) major Hara in Jour. Jap. Bot. XI (1935) 820, f. 24——H. laeviseta Nakai var. major (Hara) Hara l. c. XIV (1938) 224.
《Flora of China》 Vol. 23 (2010)
Eleocharis attenuata (Franchet & Savatier) Palla Monde Pl. 12: 40. 1910.
渐尖穗荸荠 jian jian sui bi qi
Perennials. Rhizomes decumbent or absent. Culms ± laxly to densely tufted, 20-50 cm tall or ± short, ca. 1 mm thick, terete, longitudinally sulcate. Leaf sheaths 2, basally blood-red to pale blood-red and apically pale brownish yellow, 2.5-7 cm, mouth truncate, apex shortly aristate to mucronate. Spikelet ovoid, narrowly ovoid, or ellipsoid-ovoid, 6-10 × ca. 3 mm or longer, densely many flowered, apex acute to obtuse. Basalmost glume empty, amplexicaul for whole spikelet base; fertile glumes pale to slightly rust-colored, tightly imbricate, oblong to suboblong, ca. 2.2 × 1 mm, margin hyaline, apex rounded. Perianth bristles 6, rust-colored, as long as nutlet or slightly shorter, densely to laxly retrorsely shortly spinulose. Stigmas 3. Nutlet dark yellow, obovoid, ca. 1.2 × 0.7 mm, 3-sided, sides convex, smooth; persistent style base depressed deltoid-pyramidal, 1/4-1/3 (to nearly 1/2) as long as nutlet, base cup-shaped and slightly narrower to as wide as nutlet, margin basally slightly involute, apex acute. Fl. and fr. May-Sep.
Paddy fields, pond margins, riverbanks, moist soil; 100-600 m. Anhui, Fujian, Guangxi, Henan, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Zhejiang [Japan, S Korea, Papua New Guinea, Russia (Far East), Vietnam].