Illustrated World Compendium of Orchids
URL: http://worldplants.webarchiv.kit.edu/orchids/index.php
Michael Hassler & Joachim Rheinheimer, Version 3.4. Covering 31,595 taxa, 28,166 species and 48,002 synonyms. With 8402 pictures of 5191 taxa. In cooperation with Heidelberg University Botanical Garden, Karlheinz Senghas(†), Botanical Garden of the Karlsruhe Institute of Technology. With special support by: Andys Orchids, Encinitas, California, Carl Luer, Sarasota, Florida, Marie Selby Botanical Gardens, Sarasota, Florida.