恆春月桃（薑科）再確認

The Identity of Alpinia koshunensis Hayata (Zingiberaceae)

恆春月桃（Alpinia koshunensis Hayata）最早於1915年被發表，1978年後一直被處理為臺灣月桃（Alpinia formosana K. Schumann）之同物異名。最近著者等重新檢視恆春月桃模式標本、比較原始文獻及獲得較多相關資料後，確認本臺灣特有種之存在。本文提供線繪圖、彩色照片、花粉電子掃瞄與葉肉顯微構造等以資辨識。

Alpinia koshunensis Hayata was first publicized in 1915. After that, most authors didn’t treat this species as a synonym of Alpinia formosana K. Schumann until 1978. Recently we checked the type of A. koshunensis Hayata, compared the original description and got more relevant materials. We confirm A. koshunensis Hayata is a unique species. A taxonomic treatment, color photographs, illustration, and distribution of this species are provided to aid the identification of this endemic plant. A detailed comparison table between A. koshunensis Hayata and closely related species are also provided.