細花軟葉蘭屬（蘭科）之分類地位及其在台灣之新紀錄

The Systematic Position of Genus Didiciea (Orchidaceae) and Its Occurrence in Taiwan

細花軟葉蘭為一種原產於喜馬拉雅山區之蘭科植物，本文報導其最近在台灣發現之新分布紀錄。本種係細花軟葉蘭屬之模式種，由於材料不足及花部構造欠詳，該屬之分類地位尚存有若干疑點。台灣之新鮮材料經仔細觀察與描繪，已確認本屬之唇瓣與花粉塊特徵，根據此特性及Dressler氏之蘭科分類系統，細花軟葉蘭屬宜置入樹蘭亞科之軟葉蘭族，而非原先所提議歸屬之布袋蘭族。本文亦探討細花軟葉蘭屬與軟葉蘭屬之差異，並舉兩種台灣原生種之區別特徵加以比較。

A Himalayan species of Orchidaceae, Didiciea cunninghami is recorded from Taiwan. This plant represents the type species of genus Didiciea whose taxonomic position remains uncertain due to insufficient study of flower structure. Basing on the fresh materials collected in central Taiwan, the detailed structures of flower, especially the character of lip and pollinia are carefully observed and illustrated. It is concluded that Didiciea should be included in tribe Malaxideae of Dressler's classification system of Orchidaceae, rather than in the proposed tribe Calypsoeae. The distinction between genera Didiciea and Malaxis is also discussed and exemplified by the comparison of two native species.