《广西植物志》秋海棠属(Begonia L.)增订

Supplement to Begonia L. in Flora of Guangxi

秋海棠属(Begonia L.)隶属于葫芦目(Cucurbitales)秋海棠科(Begoniaceae),有1 800余种,是世界第六大属,主要分布于美洲、非洲和亚洲的热带和亚热带地区,具有极高的观赏价值,亦可作为药用、食用、饮料和饲料等。我国有秋海棠属植物近300种,主要分布于我国的云南和广西等长江以南地区,其中云南有秋海棠属植物100余种。近年来,随着广西地区秋海棠属植物野外调查的不断深入,陆续发现并发表了大量秋海棠属新类群,使得广西产秋海棠属植物数目已超出1991年《广西植物志》(第一卷)收录的19种,因此亟需对发表于不同期刊中的类群进行系统地整理和汇总。鉴于此,该文通过查阅文献资料和考证标本信息,整理并汇总了广西产秋海棠属植物共84种,包括2个变种、11个亚种和46个特有种,新增的65种为《广西植物志》(第一卷)中未收录的类群,并补充了这些类群的特征集要、凭证标本信息和属下分组概况,为今后开展秋海棠属植物的分类修订以及系统学、进化生物学和保护生物学等研究提供了参考依据。

Begonia L. belongs to the family Begoniaceae within Cucurbitales. The genus contains over 1 800 species and is the sixth largest angiosperm genus. The species occurs in subtropical and tropical regions of Asia,Northern American and Africa and has been used as important medicinal,edible or ornamental plant. In China,there are around 300 species in the genus of Begonia,which mainly distribute along south of the Yangtze River,especially in Yunnan and Guangxi. During recent decades,more and more taxa have been discovered and described owing to deep field surveys within Guangxi. Now the number is far exceed the record in Flora of Guangxi that was published in 1991 including 19 species. However,being scattered in different journals,it is necessary to collect and gather them together. Therefore,by adding 65 species totally 84 taxa were enumerated in Flora of Guangxi based on examination of specimens and literature,including 2 subspecies,11 varieties and 46 endemic species. Meanwhile,all taxa were supplemented with the diagnostic characters as well as the infrageneric classification of these taxa. This research will provide essential information on further studies about classification,evolution and conservation in Begonia.