竹叶眼子菜Potamogeton wrightii
中文名（Chinese Name）：竹叶眼子菜
学名（Scientific Name）：Potamogeton wrightii Morong
英文名（English Common Name）：
别名（Chinese Common Name）：箬叶藻
异名（Synonym）：Potamogeton malaianus Miq. Potamogeton gaudichaudii Cham. et Schltdl. Potamogeton miyakozimensis Honda Potamogeton malaianus var. latifolius Nakai ex Mori Potamogeton tretocarpus Maxim. ex A.Benn.
科属（Family & Genus）：眼子菜科（Potamogetonaceae）眼子菜属
形态特征（Description）：多年生沉水草本。根茎发达，白色，节处生有须根。茎圆柱形，直径约2毫米，不分枝或具少数分枝，节间长可达10余厘米。叶条形或条状披针形，具长柄，稀短于2厘米；叶片长5-19厘米，宽1-2.5厘米，先端钝圆而具小凸尖，基部钝圆或楔形，边缘浅波状，有细微的锯齿；中脉显著，自基部至中部发出6至多条与之平行、并在顶端连接的次级叶脉，三级叶脉清晰可见；托叶大而明显，近膜质，无色或淡绿色，与叶片离生，鞘状抱茎，长2.5-5厘米。穗状花序顶生，具花多轮，密集或稍密集；花序梗膨大，稍粗于茎，长4-7厘米；花小，被片4，绿色；雌蕊4枚，离生。果实倒卵形，长约3毫米，两侧稍扁，背部明显3脊，中脊狭翅状，侧脊锐。花果期6-10月。2n=52。
分布（Distribution）：产我国南北各省区，生于灌渠、池塘、河流等静、流水体。俄罗斯、朝鲜、日本、东南亚各国及印度也有分布。
引自中国植物志英文版：FOC Vol. 23 Page 109, 112
Potamogeton wrightii Morong, Bull. Torrey Bot. Club. 13: 158. 1886.
竹叶眼子菜 zhu ye yan zi cai| Potamogetonaceae | Potamogeton
Potamogeton intortusifolius J. B. He, L. Y. Zhou & H. Q. Wang; P. japonicus Franchet & Savatier; P. mucronatus C. Presl (1851), not Schrader ex Sonder (1850).
Plants perennial, submerged. Rhizome terete, slender. Stems simple or rarely sparsely branched, internodes elongated, terete, ca. 2 mm in diam. Stipules axillary, convolute, large and conspicuous, 2.5-5 cm, membranous, free from leaf base. Submerged leaves petiolate; petiole 1.6-14 cm; blade narrowly oblong to oblong-lanceolate, 8-20(-31) × (0.7-)1.4-2(-2.7) cm, 9-13-veined, with a conspicuous midvein, base rounded or cuneate, margin undulate and minutely denticulate, apex mucronate. Floating leaves usually absent, sometimes present, bright green, often with reddish tinge, oblong to elliptic, 5.2-12.5 × 1.2-2.5 cm, 11-25-veined, base cuneate, apex mucronate. Spikes densely flowered, with many whorls of opposite flowers; peduncles 4-7 cm, thickened upward. Carpels 4. Fruit obovoid, 2-3.3 mm, abaxial keels 3, distinct, with a narrowly winglike midvein; beak short. Fl. and fr. Jun-Oct. 2n = 52.
Lakes, rivers, channels, ponds. Anhui, Fujian, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Yunnan, Zhejiang [India, Indonesia, Japan, Kazakhstan, Korea, Laos, Malaysia, Myanmar, New Guinea, Pakistan, Philippines, Russia, Thailand, Vietnam; Pacific islands].
The species here called Potamogeton wrightii was generally treated under the name "P. malaianus," but the type specimen of P. malaianus Miquel is actually P. nodosus.
（责任编辑：徐晔春）
学名（Scientific Name）：Potamogeton wrightii Morong
英文名（English Common Name）：
别名（Chinese Common Name）：箬叶藻
异名（Synonym）：Potamogeton malaianus Miq. Potamogeton gaudichaudii Cham. et Schltdl. Potamogeton miyakozimensis Honda Potamogeton malaianus var. latifolius Nakai ex Mori Potamogeton tretocarpus Maxim. ex A.Benn.
科属（Family & Genus）：眼子菜科（Potamogetonaceae）眼子菜属
形态特征（Description）：多年生沉水草本。根茎发达，白色，节处生有须根。茎圆柱形，直径约2毫米，不分枝或具少数分枝，节间长可达10余厘米。叶条形或条状披针形，具长柄，稀短于2厘米；叶片长5-19厘米，宽1-2.5厘米，先端钝圆而具小凸尖，基部钝圆或楔形，边缘浅波状，有细微的锯齿；中脉显著，自基部至中部发出6至多条与之平行、并在顶端连接的次级叶脉，三级叶脉清晰可见；托叶大而明显，近膜质，无色或淡绿色，与叶片离生，鞘状抱茎，长2.5-5厘米。穗状花序顶生，具花多轮，密集或稍密集；花序梗膨大，稍粗于茎，长4-7厘米；花小，被片4，绿色；雌蕊4枚，离生。果实倒卵形，长约3毫米，两侧稍扁，背部明显3脊，中脊狭翅状，侧脊锐。花果期6-10月。2n=52。
分布（Distribution）：产我国南北各省区，生于灌渠、池塘、河流等静、流水体。俄罗斯、朝鲜、日本、东南亚各国及印度也有分布。
引自中国植物志英文版：FOC Vol. 23 Page 109, 112
Potamogeton wrightii Morong, Bull. Torrey Bot. Club. 13: 158. 1886.
竹叶眼子菜 zhu ye yan zi cai| Potamogetonaceae | Potamogeton
Potamogeton intortusifolius J. B. He, L. Y. Zhou & H. Q. Wang; P. japonicus Franchet & Savatier; P. mucronatus C. Presl (1851), not Schrader ex Sonder (1850).
Plants perennial, submerged. Rhizome terete, slender. Stems simple or rarely sparsely branched, internodes elongated, terete, ca. 2 mm in diam. Stipules axillary, convolute, large and conspicuous, 2.5-5 cm, membranous, free from leaf base. Submerged leaves petiolate; petiole 1.6-14 cm; blade narrowly oblong to oblong-lanceolate, 8-20(-31) × (0.7-)1.4-2(-2.7) cm, 9-13-veined, with a conspicuous midvein, base rounded or cuneate, margin undulate and minutely denticulate, apex mucronate. Floating leaves usually absent, sometimes present, bright green, often with reddish tinge, oblong to elliptic, 5.2-12.5 × 1.2-2.5 cm, 11-25-veined, base cuneate, apex mucronate. Spikes densely flowered, with many whorls of opposite flowers; peduncles 4-7 cm, thickened upward. Carpels 4. Fruit obovoid, 2-3.3 mm, abaxial keels 3, distinct, with a narrowly winglike midvein; beak short. Fl. and fr. Jun-Oct. 2n = 52.
Lakes, rivers, channels, ponds. Anhui, Fujian, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Yunnan, Zhejiang [India, Indonesia, Japan, Kazakhstan, Korea, Laos, Malaysia, Myanmar, New Guinea, Pakistan, Philippines, Russia, Thailand, Vietnam; Pacific islands].
The species here called Potamogeton wrightii was generally treated under the name "P. malaianus," but the type specimen of P. malaianus Miquel is actually P. nodosus.
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