【摘要】 <正>在对中国钩丝壳(Uncinula sinensis Tai et Wei)的模式标本(HMAS 14193,寄主Sophora)和原作者们引证过的其他标本(HMAS 121,HMAS 11416,寄主Acer;HMAS 3824,寄主Alchornea)进行了比较研究之后,所得结论为三种不同属的寄主上的菌是各自独立的种。根据国际植物命名法规第53条规则,Sophora上的菌保留了Uncinula sinensis的名称;而Acer上的和Alchornea 上的菌立为另外两个新种,定名为Uncinula aduncoides和Uncinulaeuphorbiacearum。Uncinula sinensis Tai et Wei emend.Zheng et Chen 有汉文描述,Uncinula aduncoides Zheng et Chen sp.nov.和 Uncinula euphorbiacearum Zheng et chensp.nov.有拉丁文及汉文描述。还讨论了上述三种和它们的近似种之间的区别。更多还原

【Abstract】 Comparative studies of the type spe-cimen (HMAS 14193,on Sophora) andother specimens (HMAS 121,HMAS11416,on Acer;HMAS 3824,on Alchor-nca) cited by the original authors of thespecies Uncinula sinensis Tai et Wei havebeen made,with the result that the fungiparasitic on these three different generaof host plants are considered to be dis-tinct from one another.According toArticle 53 of the International Code ofBotanical Nomenclature,the name Un-cinula sinensis is retained for the funguson Sophora,while the fungi on Acer andAlchornea are regarded as two new spe-cies,designated as Uncinula aduncoidesand Uncinula euphorbiacearum respec-tively.Chinese diagnosis is given to Un-cinula sinensis Tai et Wei emend.Zhenget Chen,and Latin and Chinese diagno-ses to Uncinula aduncoides Zheng et Chensp.nov.and Uncinula euphorbiacearumZheng et Chen sp.nov.Differencesbetween the three species mentioned aboveand their related species are also discus-sed. The emended description for Uncinulasinensis Tai et Wei is as follows: "Mycelium amphigenous,mainly hy-pophyllous,evanescent to subpersistent,effused;perithecia scattered to gregarious,dark brown coloured,globose-depressed,(80—)90—120 (—140) μm in diam.,cellsof the perithecial wall obscure,irregularlypolygonal,7.6—20.3 μm wide;appendages10—20 (—25),straight or curved,equall-ing the diameter of the perithecium inlength,70—160 μm long,5.1—7.6 μm widethroughout,aseptate or rarely 1(—2)septate near the base,hyaline,basal cellyellow to brown coloured,thin-walled,slightly thickened toward the base,smooth,usually not swollen at the uncinate part,simply uneinate to loosely helicoid at theapex;asci 4—8,irregularly ovate tosubglobose,with or without a short stalk,48.3—55.9 (—63.5)×(33.0—) 38.1—43.2 μm;ascospores 4—6,oval-oblongor oval-ellipsoid,17.8—22.9 (—25.4)×10.2—15.2 μm."更多还原