There are two varieties of this orchid: Large Yellow Lady's Slipper (Cypripedium pubescens var. pubescens) and Small Yellow Lady's Slipper (Cypripedium parviflorum) and I can never remember which is which. These flowers are bright yellow, pouch shape. Petals (behind the "slipper") are green with the Large Yellow Lady's-slipper, whereas the Small Yellow Lady's Slipper (Cypripedium parviflorum) has reddish petals, so I guess my photo shows the latter. If you do happen to find this orchid, do not disturb it. DO NOT attempt to transplant it to your own garden, as it will likely not survive. Photographed in Weaselhead on 15 June 2011.