- helmet orchid, greenhood - 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
--1 is a kind of orchid, orchidaceous plant
--1 is a member of Pterostylis, genus Pterostylis - helmetflower, helmet orchid - any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process
--2 is a kind of orchid, orchidaceous plant
--2 is a member of Coryanthes, genus Coryanthes