Jerry's right!
But seriously, as Tindo already pointed out, there are a few parasitic orchids. Actually, the specific term for them is saprophytic. There are several species of
Corallorhiza native to the Pacific Northwest. I love seeing them in the woods. They're some of my favorite plants. They seem like they belong on another world.
Cephelanthera austinae is also native to the Pacific Northwest, but is reportedly very rare. One of its common names is the phantom orchid. I plan to search for it this summer. I just found a trail I'm familiar with that is supposed to have them!