Abstract

Lecanorchis betongensis, a new species from tropical rain forest in southern peninsular Thailand, is described and illustrated. The combination of semicircular column wings and a labellum with an odd number of major veins (but devoid of calli) places the new species in sect. Lecanorchis. However, the lack of any fusion between the labellum and the column readily distinguishes L. betongensis from all other species of the genus. The new species seems morphologically closest to L. malaccensis from Thailand, Malaysia and Sumatra.

中文摘要

本文敘述並描繪泰國南部半島熱帶雨林的新種Lecanorchis betongensis。該新種具有半圓形的蕊柱側翼，且唇瓣具奇數主脈（但缺乏肉突），故應屬於Lecanorchis節。然而，其唇瓣與蕊柱完全分離而使它與同屬其他物種明顯不同。這個新種形態上與泰國、馬來西亞、蘇門答臘的L. malaccensis相近。

Keyword: Flora of Thailand,Lecanorchis betongensis,orchids,systematics,taxonomy,Vanilloideae,泰國植物誌,Lecanorchis betongensis,蘭花,系統學,分類學,香莢蘭亞科