noun (n)

• 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(noun.plant)

  Synonym:
  greenhood
  

  source: wordnet30
• any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process(noun.plant)

  Synonym:
  helmetflower
  

  source: wordnet30