Abstract

A new species, Hedychium champasakense (Zingiberaceae), from Southern Laos is described and illustrated. It can be easily differentiated from its closest taxon, H. speciosum Wall., by its elliptic leaves, longer ligules with shallowly bilobe apices, the calyx tubes being shorter than the bract, the lanceolate-oblong or spathulate staminodes with the acute to rounded apices, and the sub-orbicular to orbicular labella with the 2-clefted apeces and the short claws. The relationship with other related species is also discussed.

中文摘要

本文描述寮國南部蝴蝶薑屬 (薑科) 新種－Hedychium champasakense Picheans. & Wongsuwan，並提供圖片。此一新種可藉其橢圓形葉片、較長且尖端些微二裂的葉舌、花萼筒短於苞片、假雄蕊長披針形或呈匙狀且尖端尖至圓形、球形唇瓣之尖端二裂、花瓣柄短等特徵，與其最近似的H. speciosum Wall.區分，與其他相關種的關係也一併予以討論。

Keyword: New species, Hedychium champasakense, Zingiberaceae, Southern Laos. 新種、Hedychium champasakense、薑科、寮國南部。