A New Species of Dryopteris (Dryopteridaceae) from Hainan Island, China

中國海南島鱗毛蕨屬（鱗毛蕨科）一新種

董仕勇(Shi-Yong Dong)

《Botanical Studies》 51卷4期 (2010/10) Pp. 537-542

摘要

本文描述了特產於海南島的鱗毛蕨科(Dryopteridaceae)一新種：芽孢鱗毛蕨(Dryopteris gemmifera)，隨文配有植株線繪圖、原色照片和孢子掃描圖。該新種的鑒別特徵為：葉片二回羽狀半裂，羽軸疏被狹而扁平的鱗片，特別是葉軸上生有1-2個芽孢。文中簡要比較了芽孢鱗毛蕨與兩個相近種：黑足鱗毛蕨(D. fuscipes)和廣西鱗毛蕨(D. guangxiensis)的異同，討論了該種的系統位置，提供了海南目前所知的11種鱗毛蕨的分種檢索表。

關鍵字

鱗毛蕨屬 ； 海南島 ； 形態學 ； 孢子 ； 分類

並列摘要

Dryopteris gemmifera, a new endemic species of Dryopteridaceae from Hainan Island, is described and illustrated. The new species is characterized by its 2-pinnatifid fronds, costae sparsely covered with narrow and flat scales, and especially by the presence of proliferous buds on the distal part of the rachis. The affinity between Dryopteris gemmifera and related species, D. fuscipes and D. guangxiensis, as well as the systematic position of this new species, is briefly discussed. An identification key to all eleven species of Dryopteris from Hainan Island is provided.

並列關鍵字

Dryopteris ； Hainan Island ； Morphology ； Spores ； Taxonomy