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Montana Field Guide

Montana Field Guides

Fairy Slipper - Calypso bulbosa var. occidentalis

Native Species

Global Rank: G5T5
State Rank: S4

Agency Status
MNPS Threat Rank:

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

Bristles of lip whitish or color of lamina, sparse; lamina commonly with reddish markings on dull white, usually shorter than horns.

Range Comments
AK south to CA and east to the Bitterroot Divide in ID (Kartesz 2009).

"Moist to dry, shady coniferous forests; 0-1600 m" (Sheviak and Catling, 2003, Fl. North America, Vol. 26).

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