臺灣衛矛科深裂衛矛組的新紀錄種──百齒衛矛

Euonymus centidens H. Lév. (Celastraceae: sect. Melanocarya): a Newly Recorded Species in Taiwan

本文報導臺灣衛矛科深裂衛矛組(sect. Melanocarya) 的新紀錄種—百齒衛矛(Euonymus centidens H. Lév.)。此新紀錄種三個族群分布於臺灣北部海拔300-600m 山區，為本種於世界分布最東界。它的形態特徵近似於同屬之菱葉衛矛(E. tashiroi Maxim.)，最大之差異為本種葉緣具細鋸齒，可明顯與菱葉衛矛之疏鋸齒區別。本文提供百齒衛矛的特徵描述、彩色照片和線繪圖以供鑑定參考。未來有必要探討此臺灣新紀錄種的分布和歷史。

We report the first record of Euonymus centidens H. Lév. of the sect. Melanocarya (Celastraceae) in Taiwan. Three populations were found in mountainous areas at 500-600 m altitude in northern Taiwan, which thus represent the easternmost distribution of E. centidens in the world. The morphology of E. centidens is similar to that of a different species within the same genus, E. tashiroi Maxim. The most distinguishable characteristic between them is that the leaf margin is serrulate in E. centidens and is only slightly and obtusely serrate in E. tashiroi. A taxonomic description, color photographs, and line drawings of E. centidens are provided here to facilitate identification. It is needed to reveal further insights regarding the distribution and history of this Taiwan new record species.