Aborted entoloma 
Acarospora fuscata 
Admirable bolete 
Agaricus moelleri 
Agrocybe praecox 
Alder Scalycap 
Alectoria sarmentosa 
Amanita ananiceps 
Amanita atkinsoniana 
Amanita calyptroderma 
Amanita fulva 
Amanita muscaria var. guessowii 
Amanita Pseudovolvata 
Amanita punctata 
Amanita velatipes 
Amauroderma rude 
American Anzia Lichen 
American Orange-Brown Ringless Amanita 
Amethyst Deceiver 
Anemone stinkhorn 
Aniseed Cockleshell 
Annulohypoxylon multiforme 
Anthracobia muelleri 
Anthracophyllum archeri