Armillaria sinapina 
Armillaria solidipes 
Arrhenia epichysium 
Arrhenia hohensis 
Arrhenia rainierensis 
Arthrophaga myriapodina 
Artist's Fungus 
Ascocoryne cylichnium 
Ash Tray Bolete 
Ash-tree bolete 
Ashen knight 
Aspen oyster mushroom 
Asterisk Lichen 
Asterophora lycoperdoides 
Astraeus morganii 
Aureoboletus auriporus 
Aureoboletus innixus 
Aureoboletus roxanae 
Auricularia angiospermarum 
Auricularia cornea 
Australian honey fungus 
Australian umber amanita 
Austro dripping bonnet 
Austroboletus gracilis