greenhood

from WordNet (r) 3.0 (2006)

greenhood
    n 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 [syn: {helmet orchid}, {greenhood}]

from The Collaborative International Dictionary of English v.0.48

Greenhead \Green"head\, Greenhood \Green"hood\, n.
   A state of greenness; verdancy. --Chaucer.
   [1913 Webster]