We noticed the orchids often grew in pairs like the ones in the photo below.
Sometimes the yellow orchids grew singly. This lone Yellow Lady's Slipper isn't really alone. I can see about five or six other flowering orchids in the background. I could see about a dozen of these bright yellow orchids from the spot where I took the picture.
The Yellow Lady's Slipper orchid uses a trap-and-funnel pollination mechanism. The trap is the pouch, or slipper, of the orchid.
Here is another photo of the orchid's bee trap... doesn't it truly look like a slipper?
Pink Lady's Slipper and my diagram of that orchid's pollination mechanism. The two orchids use a similar system... the difference is... the Pink Lady Slipper uses more of a trapdoor for an entrance into its trap, while the Yellow Lady Slipper uses what I call a "well".
Up next are some little orchids, the Showy Orchis (Galearis spectabilis), that were growing at the bottom of this hill.