Wordnet 3.0
NOUN (1)
1. 
 an orchid of the genus Spiranthes having tall erect densely flowered spiraling clusters of creamy white vanilla-scented flowers; 
 widely distributed especially in low damp places of eastern and central North America; 
[syn: screw augur, Spiranthes cernua]
WordNet (r) 3.0 (2006):
Spiranthes cernua
    n 1: an orchid of the genus Spiranthes having tall erect densely
         flowered spiraling clusters of creamy white vanilla-scented
         flowers; widely distributed especially in low damp places
         of eastern and central North America [syn: screw augur,
         Spiranthes cernua]