Similar species: Large Yellow Lady's Slipper (Cypripedium parviflorum var pubescens) - Larger; greenish petals behind the "slipper". Small White Lady's Slipper (Cypripedium candidum) - White flowers; also has greenish petals. Hybrid Lady's Slipper (Cypripedium parviflorum X C. candidum) - White flowers; purplish petals.
Small Yellow Lady's Slipper. The petals (those twisted "rays" behind the main flower) are reddish or blackish. This variety grows in boggy areas.
Small Yellow Lady's Slipper plants.
Closeup of a Small Yellow Lady's Slipper flower.
A view of the whole plant.
View from the rear.
Flower bud.
Seed capsule from the previous year. This photo was taken in January. (I don't know which variety of Yellow Lady's Slipper this is, but they both look the same at that time of year!).
PLEASE NOTE: A coloured Province or State means this species occurs somewhere in that Province/State.
The entire Province/State is coloured, regardless of where in that Province/State it occurs.
(Range map provided courtesy of the USDA website
and is displayed here in accordance with their
Policies)