广西蕨类植物新记录科——光叶藤蕨科

Stenochlaenaceae， a new recorded family of ferns from Guangxi

关键词:  光叶藤蕨科  光叶藤蕨  新记录科  广西

Key words:  Stenochlaenaceae  Stenochlaena palustris  newly recorded family  Guangxi

摘要:

报道了广西蕨类植物一新记录科——光叶藤蕨科。该科植物以茎圆柱形攀缘；叶二型，通常为奇数羽状；侧生羽片以关节着生于叶轴；不育叶羽片边缘具软骨质硬齿，羽片基部上侧具一腺体；叶脉细密，中肋两侧各具1行窄长网眼，向外伸出分离小脉；能育叶线形，孢子囊群密被羽片下面，无隔丝而与其他蕨类物种相区分。目前该科在广西仅记录光叶藤蕨1种，该文根据原始文献及广西的标本对该种进行了描述，并提供了墨线图。

Abstract:

Stenochlaenaceae is reported for the first time from Guangxi. The family can be distinguished from other ferns by rhizome creeping or climbing，terete；fronds distant，lamina imparipinnate，strongly dimorphic；sterile pinnae articulate to rachis(apical pinna not articulate)，with a gland on each petiole，sharply toothed at margin；fertile pinnae linear；veins anastomosing，forming a single row of areoles along each side of midrib，other veins free；sporangia covering the whole of abaxial surface of fertile pinnae. There is only one species recorded in Guangxi，namely Stenochlaena palustris(Burm.) Bedd. According to the original literature and specimens from Guangxi，the characteristics of this species are described and illustrated.