Online Keys for Fungi and Lichens

Online Keys Basidiomycota
Key to Common British Basidiomycetes (static) North West Fungus Group
Key to Norwegian Polypores (in Norwegian; traditional) Division of Botany and Plant Physiology, Department of Biology, University of Oslo
Selected Rust Fungi on Fabaceae (Legumes) in or near the United States (dynamic) Systematic Botany & Mycology Laboratory, ARS, USDA
Keys to Species of Amanita (PDF) Rod Tulloss' Pages
Key to North American Armillaria Species (static) Tom Volk's Fungi Home Page
Key to Species of Collybia in the Northeastern United States and Adjacent Canada (static) New York Botanical Garden
Key to Cortinarius Subgenus Dermocybe in the Nordic Countries (static) University of Oslo, Department of Biology, Myco Site
Key to the Taxa of Flammulina (static) University of Tennessee, Mycology Lab
Key to Sections of Gymnopus in the Northeastern United States and Adjacent Canada (static) New York Botanical Garden
Key to Lactarius of North America (dynamic) Michael Kuo
Leccinum and Phylloporus in Costa Rica (dynamic) New York Botanical Garden
Macrofungi of Costa Rica – Interactive Keys to Leccinum & Phylloporus species (dynamic)  
MycoKey (dynamik key to 528 genera of the Basidiomycota and more than 2000 pictures) Thomas Læssøe & Jens H. Petersens (private website)
Ravenelia in the United States and Argentina (dynamic) United States Department of Agriculture, Agricultural Research Service
Key to Species of Rhodocollybia in the Northeastern United States and Adjacent Canada (static) New York Botanical Garden
The Genus Tilletia in the United States (dynamic) United States Department of Agriculture, Agricultural Research Service
Tomentella und verwandte Gattungen (in German) Frank Dämmrich (private website)