| Definition/Meaning | Word/Phrase |
|---|---|
| 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 | greenhood , helmet orchid |
| long-spurred orchid with base leaves and petals converging under the upper sepal | Habenaria hookeri , Hooker's orchid |
| undifferentiated part of a perianth that cannot be distinguished as a sepal or a petal (as in lilies and tulips) | tepal |