Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Fairy Slipper - Calypso bulbosa

Global Rank: G5
State Rank: S4S5

Agency Status
MNPS Threat Rank:
C-value: 6

External Links

General Description
Stems 5–20 cm, scapose with 2 sheathing bracts. Leaf basal, solitary, petiolate; blade glabrous, ovate, 3–6 cm long. Inflorescence a solitary flower subtended by a purplish, linear bract, 8–20 mm long. Flowers: sepals purple, lanceolate, 14–22 mm long, erect; upper 2 petals similar; lip petal forming a white- and purple-spotted pouch, ca. 2 cm long, open at the top, yellow within; margin of the orifice (lamina) bearded with paired horns near the front; column obovate, yellowish, hood-like over the lip. Capsule lanceoloid, 20–35 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

We have varieties occidentalis (Holz.) B. Boivin and americana (R. Br). Luer.

Species Range

Range Comments
Circumboreal south to CA, AZ, CO, MI and NY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 12

(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)


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