| Noun | 1. | Platanthera chlorantha - south European orchid with dark green flowers that are larger and less fragrant than Platanthera bifolia; sometimes placed in genus Habenaria orchid, orchidaceous plant - any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors genus Platanthera, Platanthera - herbaceous terrestrial orchids of temperate northern and southern hemispheres |