Spiranthes cernua

Nodding Ladies'-tresses
Spiranthes cernua flower
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Orchidoideae
Tribe:	Cranichideae
Subtribe:	Spiranthinae
Genus:	Spiranthes
Species:	S. cernua
Binomial name
Spiranthes cernua (L.) Rich.
Synonyms
Ophrys cernua L. (basionym) Limodorum autumnale Walter Spiranthes annua Lesq. ex Brandeger & Coville Neottia cernua (L.) Sw. Gyrostachys cernua (L.) Kuntze Gyrostachys constricta Small Spiranthes constricta (Small) K.Schum. Ibidium cernuum (L.) Bouse Triorchis cernua (L.) Nieuwl.

Spiranthes cernua, commonly called the Nodding Ladies'-tresses, is a species of orchid occurring from eastern Canada to the central and eastern United States.