Meaning of adder's-mouth

ad•der's-mouth

Pronunciation: (ad'urz-mouth"), [key]
— pl. -mouths
  1. any of several North American, terrestrial orchids of the genus Malaxis, having tiny white or greenish flowers.
  2. See
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.