Aborted entoloma 
Acarospora fuscata 
Admirable bolete 
Agaricus andrewii 
Agaricus campestris 
Agaricus deardorffensis 
Agaricus moelleri 
Agrocybe pediales 
Agrocybe praecox 
Agrocybe putaminum 
Akanthomyces aranearum 
Alder Scalycap 
Alectoria sarmentosa 
Aleurodiscus disciformis 
Alyxoria varia 
Amanita americitrina 
Amanita ananiceps 
Amanita atkinsoniana 
Amanita calyptroderma 
Amanita constricta 
Amanita daucipes 
Amanita flavella 
Amanita fulva 
Amanita jacksonii