helmet orchid

(noun) any of numerous orchids of the genus Pterostylis having leaves in a basal rosette and green flowers often striped purple or brown or red with the dorsal sepal incurved to form a hood. Synonyms: helmet orchid, greenhood.

(noun) any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process. Synonyms: helmetflower, helmet orchid.