This is our only "native" orchid that isn't a native. It is a European import that has been spreading across the northern United States and southern Canada since the late 1800's. Here in Washington it is found especially in the western and especially the coastal areas of the state. It is also variable in size and color, the plants ranging from 30-90 cm and flowers from a plain green to a deep pink or purple. There are even yellow and albino forms of the species to be found but we have not seen them, though we've looked.
I visited a number of locations this summer to see and photograph the species and found plenty of them, but in some locations, especially the first, they were suffering from a very dry summer and the plants were deformed, the flowers very crowded, and many of the flowers dried up and withered. In that first set of pictures the last photo is of the green-flowered form, fma. viridis.
(Larrabee State park)
(Larrabee State Park)