Spiranthes magnicamporum Sheviak

Great Plains Ladies' Tresses

Facts About

Accepted Synonyms: none

Spiranthes magnicamporum, also called Great Plains Ladies' Tresses, is widely distributed in central Canada and the United States from Ontario to Mexico, with populations in a few East Coast states. It produces 2-3 basal leaves which usually wither by the time of flowering in the late summer or fall. It bears an inflorescence of up to 40 white, cream-colored, or yellowish flowers which are arranged in a tight spiral. The inflorescence is covered in small hairs, and the labellum curves sharply downwards. The center of the labellum is often colored yellow. Withered leaves at the time of flowering and strongly scented flowers distinguish this orchid from Spiranthes cernua. It can be found on moist to dry meadows, prairies, fields, and fens.

Spiranthes magnicamporum is apparently secure globally, although it is rare throughout much of the eastern and central parts of its range.


Although this orchid is capable of agamospermy, bumblebees, such as Bombus fervidus and Bombus nevadensis are documented pollinators. Pollinia attach to the proboscis of Bombus nevadensis.

Ecosystem Type

Fens, meadows, prairie


Leaf arrangement:
Number of leaves on stem:
Form of the labellum:
the labellum is not pouch-like
Main color of labellum:
  • white
  • yellow
Nectar spur:
Inflorescence type:
the inflorescence is a spike
Labellum length:
5–12 mm
Sepal length:
5–14 mm
Plant height:
7–60 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 Apparently Secure
US Status N/A
Canadian Status Sensitive

North America Distribution

Adapted from USDA data