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Montana Field Guide

Montana Field Guides

Fairy Slipper - Calypso bulbosa var. americana

Native Species

Global Rank: G5T5
State Rank: S4

Agency Status
MNPS Threat Rank:

External Links

General Description
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Diagnostic Characteristics
Sheviak and Catling (2003, Fl. North America, Vol. 26) provide the following characters of variety americana to distinguish it from bulbosa:

Bristles of lip yellow, extensive; lamina white or suffused with pink, usually equaling or longer than horns.

Species Range

Range Comments
Much of northern North America, running down the Rocky Mountains to Lincoln County (NM), and east to ME (Kartesz 2009).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

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Citation for data on this website:
Fairy Slipper — Calypso bulbosa var. americana.  Montana Field Guide.  .  Retrieved on , from