Abstract

Peristylus gracilis Bl., previously known from Indochina, is here newly reported from Lanyu Island, Taiwan. A description, illustration and distribution map of P. gracilis, and a key to the genus Peristylus in Taiwan are presented. This species is characterized by leaves presented at the upper part of the stem, the laxly arranged small flowers, and by the cylindrical spur that is much longer than the sepals.

中文摘要

纖細闊蕊蘭原紀錄分布於東南亞一帶，近期則發現於臺灣離島蘭嶼。本研究提供纖細闊蕊蘭之種的敘述、檢索表、線描圖、彩色照片以及在世界上之分布地點。本種之主要特徵為葉片生長在莖的上端，具有較疏的花序、較小的花，以及長於側萼片的長圓柱狀距。

Keyword: Peristylus gracilis, Orchidaceae, Taxonomy, Lanyu, Taiwan. 纖細闊蕊蘭、蘭科、分類學、蘭嶼、臺灣。