Corallorhiza trifida Chatel.: a little known partial myco-heterotrophic orchid from the valley of flowers National Park, Western Himalaya, India.

A small population of Corallorhiza trifida Chatel., a partial myco-heterotrophic orchid was recorded from the state of Uttarakhand after a gap of over 50 years. In this article we present an update on its systematics (nomenclature, morphology, phytogeography), ecology and aspects of conservation.