闊葉鱗蓋蕨在臺灣的再發現

A Rediscovery of Microlepia platyphylla (Don) J. Sm. (Dennstaedtiaceae) from Taiwan

闊葉鱗蓋蕨（Microlepia platyphylla （Don） J. Sm.，碗蕨科）在臺灣僅有1912年與1914年的兩次採集紀錄，此後近百年未曾報導，而被認為可能已地區絕滅。近期我們於嘉義縣阿里山地區的調查再次尋獲此一物種，故於本文報導此發現，並提供其形態描述、生育地狀態、彩色圖片，以及分類註記。依循IUCN受威脅等級與準則，我們評估此物種在臺灣的稀有等級為嚴重瀕臨絕滅，亟需進行相關之保育計畫。

Microlepia platyphylla (Don) J. Sm. (Dennstaedtiaceae) was collected from Taiwan only twice: first in 1912 and second in 1914. Since then it had not been reported for nearly 100 years and considered to be regionally extinct. During our recent field survey, M. platyphylla was rediscovered from the Alishan area of Chiayi County. This paper reports the rediscovery with descriptions of its morphological characters and habitat with color photos and brief notes on taxonomy. According to the IUCN Red List Categories and Criteria, M. platyphylla was evaluated as a critically endangered species in Taiwan. Conservation projects are required for preventing it from regional extinction.