Instructions on how to propagate and grow hardy orchids in a European climate. Anders R. Johnsen, Denmark.
Wild orchids in Europe, North Africa, and the Middle East. Sven Birkedal. Sweden.
Native Orchids of the Pacific NW and Canadian Rockies
A photographic record of the beautiful, and often rare, native orchids that can be found in the area. Lynden, Washington, USA.
Orchids of Wisconsin
An interactive guide to the native orchids of Wisconsin. Descriptions and pictures. Jeffrey R. Hapeman. University of Wisconsin, USA.