A New Form of the Mycoheterotrophic Plant Lecanorchis japonica (Orchidaceae) from Japan

Abstract

A new color variant of Lecanorchis japonica Blume, L. japonica f. lutea (Orchidaceae), is described from Kagoshima and Chiba prefectures, Japan. Lecanorchis japonica f. lutea differs from L. japonica f. japonica only by its brilliant yellow coloration. Additionally, L. japonica f. lutea is superficially similar to L. hokurikuensis f. kiiensis but differs in having widely open flowers (vs. barely open flowers) and a nearly entire column wing (vs. apparent projections below column wing).