Species › Plants › Small Whorled Pogonia

Small Whorled Pogonia

Isotria medeoloides

Very rarePlant
Illustration of Small Whorled Pogonia (Isotria medeoloides)

Small Whorled Pogonia is one of the rarest orchids in North America and among the rarest plants in the eastern United States, listed as threatened under the Endangered Species Act. It produces a whorl of five leaves at the top of a hollow stem and one or two small, yellowish-green flowers. It grows in open, dry to moist second-growth forests with acid, well-drained soils across widely scattered locations in the eastern United States. The species is extremely cryptic — it may not emerge above ground for years at a time — making population monitoring difficult.

Habitat
Open second-growth deciduous forests, acidic well-drained soils, disturbed woodlands
Diet
Pollinated by small bees; requires specific mycorrhizal fungi throughout its entire life cycle
How common
Very rare

Best time to see a Small Whorled Pogonia

The best time to see a Small Whorled Pogonia is May–June, when about 72% of U.S. sightings happen, based on 138 research-grade iNaturalist observations.

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