江南荸荠Heleocharis migoana Ohwi et T. Koyama
江南荸荠Heleocharis migoana Ohwi et T. Koyama
21.江南荸荠 图版XXIII，15-17
Heleocharis migoana Ohwi et T. Koyama in Bull. Nat. Sci. Mus. Tokyo n. s. III (1956) 27.
具匍匐根状茎。稈少数或多数。丛生或密丛生，稍软弱，干后扁，高20-50厘米，直径1-2毫米，具肋条和纵槽，有横脉，干后脉多少隆起而呈疣状。叶缺如，只在小穗的基部有二个叶鞘；长鞘的下部淡红色或褐色，上部绿色，鞘口截形，高3-10厘米。小穗长圆状披针形，顶端钝或近急尖，长10-18毫米，近基部直径3-4.5毫米，很淡血红色，有极多数花；在小穗基部有二片鳞片中空无花，最下一片抱小穗基部的半周或过半周；其余鳞片全有花，长圆状披针形，顶端近急尖，长3.5-4.5毫米，宽1-1.5毫米，淡血红色，背部色很淡，边缘很狭，干膜质，中脉一条淡绿色；下位刚一毛4条，长于小坚果半倍至一倍，稍劲健，淡绣红色，不向外展开，有倒刺，刺密而短；柱头2。小坚果倒卵形，双凸状，长1.1-1.3毫米，宽0.7-0.8毫米，黄色，或淡黄色；花柱基为狭圆锥形，顶端渐尖，长为小坚果的一半，宽约为小坚果的1/3。花果期4-8月。
产于安徽（安庆，模式产地）、浙江和江西。生境不详。
《Flora of China》 Vol. 23 (2010)
Eleocharis migoana Ohwi & T. Koyama Bull. Natl. Sci. Mus., Tokyo, n.s. 3: 27. 1956.
江南荸荠 jiang nan bi qi
Perennials, stoloniferous. Culms tufted to densely tufted, 20-50 cm tall, 1-2 mm thick, slightly soft, longitudinally ribbed and sulcate, conspicuously transversely septate, ± tuberculate when dry. Leaf sheaths 2, basally reddish brown to brown and apically green, tubular, 3-10 cm, mouth truncate. Spikelet narrowly oblong-ovoid, 10-18 × 3-4.5 mm, many flowered, apex obtuse to subacute. Basal 2 glumes empty; basalmost glume amplexicaul for 1/2 or more of spikelet base; fertile glumes ± pale at middle and blood-red on sides, slightly tightly imbricate, oblong-lanceolate, 3.5-4.5 × 1-1.5 mm, midvein greenish, margin narrowly hyaline, apex subacute. Perianth bristles 4, 1.5-2 × as long as nutlet (including style base), densely and shortly retrorsely spinulose. Stigmas 2. Nutlet yellow to yellowish, obovoid, 1-1.3 × 0.7-0.8 mm, biconvex, smooth; persistent style base narrowly conic, ca. 1/2 as long and ca. 1/3 as wide as nutlet, apex attenuate. Fl. and fr. Apr-Aug.
● Moist grasslands on mountain slopes. Anhui, Jiangsu, Jiangxi, Zhejiang.
科名：莎草科 Cyperaceae
属名：荸荠属 Heleocharis
21.江南荸荠 图版XXIII，15-17
Heleocharis migoana Ohwi et T. Koyama in Bull. Nat. Sci. Mus. Tokyo n. s. III (1956) 27.
具匍匐根状茎。稈少数或多数。丛生或密丛生，稍软弱，干后扁，高20-50厘米，直径1-2毫米，具肋条和纵槽，有横脉，干后脉多少隆起而呈疣状。叶缺如，只在小穗的基部有二个叶鞘；长鞘的下部淡红色或褐色，上部绿色，鞘口截形，高3-10厘米。小穗长圆状披针形，顶端钝或近急尖，长10-18毫米，近基部直径3-4.5毫米，很淡血红色，有极多数花；在小穗基部有二片鳞片中空无花，最下一片抱小穗基部的半周或过半周；其余鳞片全有花，长圆状披针形，顶端近急尖，长3.5-4.5毫米，宽1-1.5毫米，淡血红色，背部色很淡，边缘很狭，干膜质，中脉一条淡绿色；下位刚一毛4条，长于小坚果半倍至一倍，稍劲健，淡绣红色，不向外展开，有倒刺，刺密而短；柱头2。小坚果倒卵形，双凸状，长1.1-1.3毫米，宽0.7-0.8毫米，黄色，或淡黄色；花柱基为狭圆锥形，顶端渐尖，长为小坚果的一半，宽约为小坚果的1/3。花果期4-8月。
产于安徽（安庆，模式产地）、浙江和江西。生境不详。
《Flora of China》 Vol. 23 (2010)
Eleocharis migoana Ohwi & T. Koyama Bull. Natl. Sci. Mus., Tokyo, n.s. 3: 27. 1956.
江南荸荠 jiang nan bi qi
Perennials, stoloniferous. Culms tufted to densely tufted, 20-50 cm tall, 1-2 mm thick, slightly soft, longitudinally ribbed and sulcate, conspicuously transversely septate, ± tuberculate when dry. Leaf sheaths 2, basally reddish brown to brown and apically green, tubular, 3-10 cm, mouth truncate. Spikelet narrowly oblong-ovoid, 10-18 × 3-4.5 mm, many flowered, apex obtuse to subacute. Basal 2 glumes empty; basalmost glume amplexicaul for 1/2 or more of spikelet base; fertile glumes ± pale at middle and blood-red on sides, slightly tightly imbricate, oblong-lanceolate, 3.5-4.5 × 1-1.5 mm, midvein greenish, margin narrowly hyaline, apex subacute. Perianth bristles 4, 1.5-2 × as long as nutlet (including style base), densely and shortly retrorsely spinulose. Stigmas 2. Nutlet yellow to yellowish, obovoid, 1-1.3 × 0.7-0.8 mm, biconvex, smooth; persistent style base narrowly conic, ca. 1/2 as long and ca. 1/3 as wide as nutlet, apex attenuate. Fl. and fr. Apr-Aug.
● Moist grasslands on mountain slopes. Anhui, Jiangsu, Jiangxi, Zhejiang.