中国绣球属植物的修订

A REVLSION OF THE GENUS HYDRANGEA IM CHINA

中国绣球属植物的修订卫兆芬（中国科学院华南植物研究所，广州５１０６５０）ＡＲＥＶＬＳＩＯＮＯＦＴＨＥＧＥＮＵＳＨＹＤＲＡＮＧＥＡＩＭＣＨＩＮＡ￥ＷｅｉＣｈａｏｆｅｎ（ＳｏｕｔｈＣｈｉｎａＩｎｓｔｉｔｕｔｅｏｆＢｏｔａｎｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ...

Hydrangea is one of the largest genera of Hydrangeaceae, comprising about seventy-three species. They are disjunctly distributed in eastern Asia and eastern North America, and extend southward to the tropics of both hemispheres.Forty-six species and ten varieties are now recognized. in China and mostly concentrated in the regions of South-west、China、South China、Central China Eastern China and Taiwan Province.The genus has been intensively studied by many botanists such as Rehder and Engler et cetera. Their research work has laid the foundation for the classification,even though there are some defects.There are three major taxa or subsections in Rehder’s and Engler’s sect. Euhydrangea, but the characteristics show that these three taxa or subsections are in different evolutionary stages. The first subsect. Petalanthae is considered as the most primitive one of the three subsections because of having half superior ovary, extended apically but not conic capsules, unguiculate petals and reticulate seeds; the second subsect. Heteromallae is more advanced in having petal without claw and seed with longitudinal striations; the third subsect. Asperae is the most advanced one because of its totally inferior ovary. Therefore, there is good reason to change the three subsections into three separate sections. For the rest two sections i. e. sect.Calyptranthe and sect. Cornidia, some moditication has also been made.As a result the genus is divided into five sections: 1. sect. Petalanthae(Maxim).Wei; 2. sect. Heteromallae (Red.) Wei; 3. sect. Hydrangea; 4. sect. Cornidia (Ruiz et Pav.) Eng1.; 5. sect. Calyptranthe Maxim.In addition, in this paper five new species are described.