中国眼子菜属一新种

A New Spccics of Potamogeton L. from China

近年来在四川、黑龙江和新疆等省、自治区发现眼子菜属一个新种，该新种因具异枝异叶，被命名为异枝眼子菜（新种）；其果具相同的背腹脊（棱）各一条；嘴小，背曲如钩；被片果时变厚硬而绿色；鲜果球形，干后果皮的在皮细胞呈多角形，而不同于属内其他种类。且生态变异幅度大，生丛密杂草之空隙中者，无浮泛叶，正常开花结果；生近岸波动之浅水中者，则通常不分枝。

A new species of Potamogeton L.,which was found in Sichuan,Heilongjiang andXinjiang Provinces respectively,from 1985 to 1989,is introduced.In Sichuan,it was found inHongyuan County,on marsh of high altitude(at sea level of 3500 m),growing scateredly in smallwater m8sses.In Heilongjiang,it grew in a small river by the road.In Xinjiang Uygtir Au-tonomous Region,it was found in Hanas Lake and a shallow pond.All the above specimens are de-posited in the Aquatic Herbarium of Yuzhou University.As the new species has different steins andleaves,so it was named by the author as Potamogeton Heterocaulis Diao,sp.nov. Its fruit has asame keel both on the ventral and dorsal surfaces;the beak is very small and recurved as a hook;tepl becomes thick and hard with green colour; fresh fruit is globose and green. and its epidermal cells of pericarp are in polygonal shape while dried.So that it is very different from other specieswithin the Genus Moreover.it has a wide diversity of form,when growing among the empty ofthick grass,it has no floating leaves.but blooming and fruiting normally;and not branched in moving shallow water near the bank of Hanas Lake in former Sino- Russian Border.