1. Potamogetonaceae (眼子菜科)
2. Potamogeton (眼子菜属)
3. Potamogeton cristatus (鸡冠眼子菜)

学名(拉丁名)	Potamogeton cristatus
中文名	鸡冠眼子菜
命名人	Rgl. et Maack.
中文科名	眼子菜科
拉丁属名	Potamogeton
类型	species
拉丁科名	Potamogetonaceae
中文属名	眼子菜属

Potamogeton iriomotensis Masamune.

Plants annual or perennial, in fresh water. Rhizome inconspicuously present or absent. Stems filiform, terete, ca. 0.5 mm in diam., simple or sparsely branched; dormant turions axillary, narrowly fusiform, with 3-5 acerose leaves. Leaves dimorphic; stipules convolute, 6-10 mm, membranous, free from leaf base. Submerged leaves sessile, linear to filiform, 2.5-7 cm × ca. 1 mm, 3-veined. Floating leaves usually alternate, opposite just below peduncle, petiolate; petiole 1-1.5 cm; blade opaque, ovate to ovate-oblong, rarely lanceolate, 1.5-2.5 cm × 3-11 mm, leathery, 7-veined, base rounded or cuneate, apex acute or obtuse. Spikes with 3-5 whorls of opposite flowers; peduncles 0.8-1.5 cm. Carpels 4. Fruit obovoid, 1.5-2.5 mm, laterally compressed and shortly pedicellate, abaxial keel cristate; beak 1-1.2 mm, slender. Fl. and fr. May-Sep.

Ponds, paddy fields. Anhui, Fujian, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Sichuan, Taiwan, Zhejiang [Japan (including Ryukyu Islands), Korea, Russia].

Potamogeton cristatus
Family Name:	Potamogetonaceae	Genera name:	Potamogeton
Species name:	cristatus	Genera status:
NLR:		Comments: