香港蕨类植物分布新记录和名称修订(三)

New Records and Clarification of Some Names of Pteridophyta in Hong Kong (Ⅲ)

摘要:

报道了近年在香港再发现的两个属-黄腺蕨属（又蕨科）和网藤蕨属（藤蕨科）,并对港产的黄腺蕨、有盖黄腺蕨和网藤蕨的标本和文献进行整理,及对国产的相近种类作分类处理,把钩形黄腺羽蕨和广西黄腺羽蕨归并于黄腺蕨中。此外,亦对网藤蕨进行了长期的观察,证实了Holttum关于该种的叶轴顶端的形态修正。黄腺蕨属和网藤蕨属在香港的再发现,对华南蕨类植物地理区系的研究具有一定的意义。由于这两属在本地均为罕见之种类,故可孝考虑列入香港珍稀蕨类名单之内。

Abstract:

This paper reports 2 genera. Pleocnemia Presl (Aspidiaceae) and Lornagramma J. Sm. (Lomariopsidaceae), of pteridophytes recently re-discovered in Hong Kong. The specimens of Pleocnemia winitii Holtt.. P. conjugate (Bl.) Presl, and Lomagramma matthewii (Ching) Holtt. from Hong Kong, and related references were reviewed. The closely related species found in China were revised taxonomically. Pleocnemia hamata Ching et Chu H. Wang, and P. kwangsiensis Ching et Chu H. Wang are regarded as two new synonyms of P． winitii Holtt．In addition，after observation on Lomagrcanmct matthewii (Ching) Holtt. for a long period，we consider that Holttum’s description on morphology of rachis apex of this species is exact． The re-discovery of Pleocnemia Presl and Lomagramma J．Sm ．in Hong Kong is significant for the study of phytogeography of pteridophytes in South China． It is recommended to list them in rare and endangered ferns in Hong Kong as they are quite rare locally.