Large Northern Yellow Lady's Slipper

We had seen these in Banff and now saw them again in Mount Robson Provincial Park. Backpacking up the Berg Lake trail we stopped and photographed these by Kinney Lake and again at our campground in Whitehorn. At Kinney Lake they were past their peak but at the higher elevation of Whitehorn they were perfect. They are the Large Northern Yellow Lady's Slipper, Cypripedium parviflorum var. parviflorum, very rare in Washington but common further north.