Definition of 'helmet orchid'

Noun

1. 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: greenhood
2. 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

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