Spiranthes cernua (L.) L.C. Rich.

Nodding Ladies' Tresses

Facts About

Accepted Synonyms: Ibidium cernuum, Ophrys cernua

Spiranthes cernua, commonly called Nodding Ladies' Tresses, is widely distributed along the Coastal Plain and southern Appalacian Mountains. It produces 1-5 basal leaves held upright that may begin to wither shortly before the plant flowers but usually persist through anthesis. It bears a spike of white to ivory-colored nodding flowers that form a single row in a coiled spiral. This species is distinguished by its upward sweeping lateral sepals and a white to pale yellow labellum with conical, highly reduced tubercles. It grows in moist fields, meadows, bogs, marshes, and fens, as well as along roadsides and riverbanks.

Spiranthes cernua is considered globally secure.


Although this orchid may be capable of autogamy through agamospermy, Bombus fervidus, Bombus impatiens, Bombus terricola and an unidentified Dialictus bee are known insect pollinators. As in most Spiranthes, bumblebees move upward on the inflorescence in search of nectar. Older flowers at the base of the stalk have more nectar, which makes them an efficient first stop for the foraging bumble bees.

Ecosystem Type

Bogs, disturbed habitats, fens, marshes, meadows, woodlands


Leaf arrangement:
  • alternate
  • basal
Number of leaves on stem:
  • one
  • two
Form of the labellum:
the labellum is not pouch-like
Labellum outline:
the labellum is simple
Main color of labellum:
Nectar spur:
Inflorescence type:
the inflorescence is a spike
Labellum characteristics:
the labellum is simple
Labellum length:
6–10.5 mm
Sepal length:
6–12 mm
Plant height:
10–60 cm
Show All Characteristics

Native to North America


North American Conservation Status & Distribution

Conservation Status

Select a location to view conservation status:

Conservation and Wetland Status
Global Rank Secure
US Status N/A
Canadian Status Secure

North America Distribution

Adapted from USDA data