Species At Risk

Nodding Pogonia

(Triphora trianthophora)


Nodding Pogonia
Nodding Pogonia occurrences map


Nodding Pogonia is a small orchid that reaches five to 31 centimetres in height. It typically has one or more small rounded leaves that clasp the stem.

Nodding Pogonia typically produces one to three whitish-pink flowers in late summer, but only in years when the conditions are favourable. The fruit is an erect, green capsule.

Action we are taking:


Nodding Pogonia ranges from New England to Ontario, and south to Texas and Florida. In Canada, Nodding Pogonia is found only in southwestern Ontario, and only at two sites. At one of those sites, it has not been seen in more than 20 years.


In Ontario, Nodding Pogonia is found in rich, moist deciduous forests with a well-developed tree canopy and a deep layer of leaf litter.


Threats to Nodding Pogonia in Canada include trampling, soil compaction, collection, changes in forest canopy from tree cutting and storms, and changes in soil moisture. Invasive species, such as exotic earthworms and Garlic Mustard, may also be having a negative impact on the species.


Nodding Pogonia is protected under Ontario’s Endangered Species Act and the federal Species at Risk Act.

What You Can Do to Help Nodding Pogonia

  • The Ministry of Natural Resources tracks species at risk such as Nodding Pogonia. You can use a handy online form to report your sightings to the Natural Heritage Information Centre. Photographs with specific locations or mapping coordinates are always helpful. nhic.mnr.gov.on.ca
  • Report any illegal activity related to plants and wildlife to 1-877-TIPS-MNR (847-7667).
  • Private land owners have a very important role to play in species recovery. If you find Nodding Pogonia on your property, you may be eligible for stewardship programs that support the protection and recovery of species at risk and their habitats.
  • Volunteer with your local nature club or provincial park to participate in surveys or stewardship work focused on species at risk.
  • Invasive species seriously threaten many of Ontario’s species at risk. To learn what you can do to help reduce the threat of invasive species, visit: ontario.ca/invasivespecies ; www.invadingspecies.com ; www.ontarioinvasiveplants.ca ; and, www.invasivespecies.gc.ca .
  • Pollinators, such as bees, are in steep decline across the globe and they play a key role in the survival of many of Ontario’s rare plants. For information on how you can help scientists monitor pollinator populations in Ontario visit: www.seeds.ca/proj/poll.
  • The Carolinian forests of southern Ontario support an amazing diversity of plants and wildlife, including many species at risk. Carolinian Canada is working to help recover species at risk and their habitats. For more information, visit: www.carolinian.org/SpeciesHabitats.htm.

Did you know?

As do all orchids, Nodding Pogonia has a symbiotic relationship with fungus found in the soil, which means they are interdependent for nourishment and survival. The Nodding Pogonia will only produce seeds if the necessary fungus is present in the soil.

Did you know?

The seeds of Nodding Pogonia are dispersed by the wind.

Did you know?

Orchids can remain dormant in the soil before emerging when the conditions are suitable.

The Endangered Species Act

Contact your local ministry office

Often the best source of local information on species at risk is your nearest ministry office. Call with your questions or concerns.