無柄鳳尾蕨的新分布與阿里山鳳尾蕨的確認

New Distribution of Pteris kawabatae Sa. Kurata and Re-circumscription of Pteris arisanensis Tagawa

無柄鳳尾蕨過去被認為是日本特有種，本文報導了本種在大陸、台灣和越南的新分布；另確認P. arisanensis為一獨立的種，並建議其中文名稱為「阿里山鳳尾蕨」。本文並提供檢索表，比較幾種形態相似的台灣產鳳尾蕨屬物種，包括阿里山鳳尾蕨、弧脈鳳尾蕨、傅氏鳳尾蕨、三角脈鳳尾蕨、無柄鳳尾蕨與烏來鳳尾蕨等。

Pteris kawabatae Sa. Kurata was regarded as endemic to Japan. We here report its new distribution in China, Taiwan, and Vietnam. We also re-circumscribe P. arisanensis as an independent species and propose its Chinese name herein. A key is provided to compare those morphologically similar Pteris species in Taiwan, including P. arisanensis, P. biaurita, P. fauriei, P. linearis, P. kawabatae and P. wulaiensis.