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Monocotyledoneae (Monocots)
Orchidaceae (Orchid Family)
State Protection
Federal Protection
Not Listed
State Conservation Status Rank
Global Conservation Status Rank


State Ranking Justification

There are no verified occurrences, 10 historical occurrences.

Conservation and Management



This orchid has not been seen in New York since 1969, and was likely never very abundant in the state. There are historical records from bogs, Northern White-cedar swamps, and the edges of Hemlock swamps (New York Natural Heritage Program 2011). Mesic to wet coniferous forests, mixed forests, and bogs (FNA 2002a).

Associated Ecological Communities

  • Black spruce-tamarack bog* (guide)
  • Dwarf shrub bog* (guide)
  • Hemlock-hardwood swamp* (guide)
  • Northern white cedar swamp* (guide)
  • Rich graminoid fen* (guide)
  • Rich shrub fen* (guide)

Associated Species

  • Larix laricina (tamarack)
  • Thuja occidentalis (northern white cedar, arbor vitae)
  • Tsuga canadensis (eastern hemlock)


New York State Distribution

Historically known from 9 counties, New York is at southeast limit of range, Vermont has extant populations.

Identification Comments

Best Time to See

The best time to survey for Calypso is when it is flower, normally late May through early June in New York.

  • Vegetative
  • Flowering
  • Fruiting

The time of year you would expect to find Calypso vegetative, flowering, and fruiting in New York.


Calypso bulbosa var. americana (R. Br. ex Ait. f.) Luer

  • Kingdom Plantae
    • Phylum Anthophyta
      • Class Monocotyledoneae (Monocots)
        • Order Orchidales
          • Family Orchidaceae (Orchid Family)

Additional Common Names

  • Fairyslipper


  • Cytherea bulbosa (L.) Salisb.

Additional Resources


Flora of North America Editorial Committee. 2002a. Flora of North America North of Mexico. Vol. 26. Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York. xxvi + 723 pp.

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.

Mitchell, Richard S. and Gordon C. Tucker. 1997. Revised Checklist of New York State Plants. Contributions to a Flora of New York State. Checklist IV. Bulletin No. 490. New York State Museum. Albany, NY. 400 pp.

New York Natural Heritage Program. 2019. New York Natural Heritage Program Databases. Albany, NY.

Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research University of South Florida]. New York Flora Association, Albany, New York


About This Guide

Information for this guide was last updated on: August 9, 2011

Please cite this page as:
New York Natural Heritage Program. 2019. Online Conservation Guide for Calypso bulbosa var. americana. Available from: Accessed March 20, 2019.

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