Large Whorled Pogonia
Scientific Name: Isotria verticillata
Taxonomy Group: Vascular Plants
Last COSEWIC Assessment: November 2011
Last COSEWIC Designation: Endangered
SARA Status: Schedule 1, Endangered
Quick Links: | Photo | Description | Distribution and Population | Habitat | Biology | Threats | Protection | Other Protection or Status | Recovery Initiatives | Recovery Team | National Recovery Program | Documents
Image of Large Whorled Pogonia
Large Whorled Pogonia (Isotria verticillata) is an orchid that has a single whorl of five to six leaves at the top of the stem. The leaves may be overtopped by a single yellowish-green flower. The five narrow, purplish sepals are much longer than the petals. (Updated 2017/05/23)
Distribution and Population
The orchid occurs in the United States from New England and Michigan south to Texas and Georgia. Its only Canadian occurrence is in southwestern Ontario. In 1986, the orchid was known at two sites. Since that time it seems to have disappeared at one of the sites and only one plant has been seen at the other site. A third station was found after the status report was written; however, it seems to have been eliminated recently. (Updated 2017/05/23)
This plant requires rich, moist, deciduous or mixed forest on sandy soil with a thick leaf litter, lots of humus, and a relatively open canopy. (Updated 2017/05/23)
Large Whorled Pogonia is a relatively small and inconspicuous plant that is very similar to non-flowering shoots of the common Indian Cucumber-root (Medeola virginiana). This similarity could cause the orchid to be trampled inadvertently by those trying to find the species. (Updated 2017/05/23)
The main limiting factor is the lack of suitable mixed forest habitat with an acidic substrate in the heavily developed Carolinian Zone of southwestern Ontario. The species is at risk from trampling by those who would like to find or photograph this rare orchid. (Updated 2017/05/23)
Federal ProtectionThe Large Whorled Pogonia is protected under the federal Species at Risk Act (SARA). More information about SARA, including how it protects individual species, is available in the Species at Risk Act: A Guide.
The Large Whorled Pogonia is protected by the Ontario Endangered Species Act. Under this Act, it is prohibited to kill, harm, harass, or collect this species, or to destroy its habitat.
Provincial and Territorial Protection
Other Protection or Status
An export permit is required under the Convention on International Trade of Endangered Species of Wild Flora and Fauna (CITES).
Status of Recovery Planning
Recovery Strategies :
Name Recovery Strategy for the Large Whorled Pogonia (Isotria verticillata) in Canada
Status First posting on SAR registry
Carolinian Woodland Plants Recovery Team
Jarmo Jalava - Chair/Contact - Other
Phone: 705-760-2823 Send Email
PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.
6 record(s) found.
- COSEWIC Status Reports (1 record(s) found.)
- Response Statements (1 record(s) found.)
- Recovery Strategies (1 record(s) found.)
- COSEWIC Annual Reports (1 record(s) found.)
- Consultation Documents (1 record(s) found.)
- Recovery Document Posting Plans (1 record(s) found.)
COSEWIC Status Reports
COSEWIC Annual Reports
Recovery Document Posting Plans
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