Boletus subcaerulescens 
Boletus subfraternus 
Boletus subvelutipes 
Boletus variipes 
Boletus vermiculosoides 
Bondarzewia mezenterica 
Bonfire Scalycap 
Bonnet mould 
Booted Knight 
Boreal button lichen 
Boreal Oakmoss 
Botryobasidium aureum 
Botryosphaeria dothidea 
Bottlebrush Frost Lichen 
Bouillon Bolete 
Bovine Bolete 
Bowl Hoodie 
Bracted sulphur lichen 
Brain puffball 
Branched pixie-cup lichen 
Brick Cap 
Bridal Veil Stinkhorn 
Bristly Tropical Cup 
British soldier lichen