Bactridium flavum
Badhamia affinis
Badhamia capsulifera
Badhamia foliicola
Badhamia macrocarpa
Badhamia nitens
Badhamia panicea
Badhamia utricularis
Baeospora myosura
Banded Mottlegill
Bark Bonnet
Basidioradulum radula
Bauhinus cordae
Bay Bolete
Bay Cup
Bay Polypore
Bearded Dapperling
Bearded Milkcap
Bearded Seamine
Beauveria bassiana
Bedstraw Smut
Beech Barkspot
Beech Jellydisc
Beech Milkcap
Beech Tarcrust
Beech Woodwart
Beechleaf Bonnet
Beechmast Candlesnuff
Beechwood Sickener
Beefsteak Fungus
Beige Coral
Belonidium mollissimum
Belonidium sulphureum
Berlesiella nigerrima
Bertia moriformis var. moriformis
Bicoloured Deceiver
Big Blue Pinkgill
Big Smoky Bracket
Bionectria ralfsii
Birch Besom
Birch Bolete
Birch Brittlegill
Birch Knight
Birch Mazegill
Birch Milkcap
Birch Polypore
Birch Rust
Birch Webcap
Birch Woodwart
Biscogniauxia nummularia
Bisifusarium dimerum
Bispora antennata
Bisporella citrina
Bisporella subpallida
Bisporella sulfurina
Bitter Almond Brittlegill
Bitter Beech Bolete
Bitter Bolete
Bitter Bracket
Bitter Chocolate Rust
Bitter Knight
Bitter Oysterling
Bitter Poisonpie
Bitter Waxcap
Bitter Webcap
Bjerkandera adusta
Bjerkandera fumosa
Black Bulgar
Black Milking Bonnet
Black Tooth
Blackedge Bonnet
Blackening Brittlegill
Blackening Waxcap
Blackfoot Polypore
Bleach Cup
Bleached Brittlegill
Bleeding Bonnet
Bleeding Broadleaf Crust
Bleeding Conifer Crust
Bleeding Oak Crust
Bleeding Porecrust
Blistered Cup
Bloodred Webcap
Bloody Brittlegill
Blue Band Brittlegill
Blue Edge Pinkgill
Blue Roundhead
Blue Spot Knight
Blue Tooth
Blueing Bracket
Blueleg Brownie
Blumeria graminis
Blusher
Blushing Bolete
Blushing Bracket
Blushing Dapperling
Blushing Fibrecap
Blushing Rosette
Blushing Waxcap
Blushing Wood Mushroom
Boeremia exigua var. exigua
Boeremia hedericola
Bog Beacon
Bog Bell
Bolbitius reticulatus
Bolbitius titubans var. titubans
Bolbitius vitellinus
Bolete Mould
Boletus aestivalis
Boletus badius
Boletus calopus
Boletus chrysenteron
Boletus cisalpinus
Boletus communis
Boletus declivitatum
Boletus edulis
Boletus erythropus
Boletus ferrugineus
Boletus fragrans
Boletus impolitus
Boletus lanatus
Boletus legaliae
Boletus luridiformis var. luridiformis
Boletus luridus
Boletus parasiticus
Boletus porosporus
Boletus pruinatus
Boletus pseudoregius
Boletus pulverulentus
Boletus queletii
Boletus radicans
Boletus reticulatus
Boletus rhodoxanthus
Boletus rubellus
Boletus satanas
Boletus satanoides
Boletus subtomentosus
Bonfire Cauliflower
Bonfire Scalycap
Bonnet Mould
Bonomyces sinopicus
Botryobasidium conspersum
Botryobasidium isabellinum
Botryobasidium vagum
Botryohypochnus isabellinus
Botryosphaeria stevensii
Botryosporium pulchrum
Botryotinia calthae
Botrytis aclada
Botrytis allii
Botrytis cinerea
Botrytis elliptica
Botrytis fascicularis
Botrytis tulipae
Bovine Bolete
Bovista dermoxantha
Bovista nigrescens
Bovista plumbea
Brachysporium bloxamii
Brachysporium britannicum
Bracken Club
Bracken Map
Branched Shanklet
Branching Oyster
Brefeldia maxima
Bremia lactucae s. str.
Bremia sonchicola
Bremia tulasnei
Brevicellicium olivascens
Brick Tuft
Brittle Cinder
Britzelmayria multipedata
Brown Birch Bolete
Brown Brain
Brown Cup
Brown Ear
Brown Mottlegill
Brown Puffball
Brown Rollrim
Bruising Webcap
Brunnipila calyculiformis
Brunnipila clandestina
Brunnipila palearum
Bryoscyphus dicrani
Buchwaldoboletus lignicola
Buglossoporus quercinus
Bulbillomyces farinosus
Bulbomollisia stromatica
Bulbous Bonnet
Bulbous Fibrecap
Bulbous Honey Fungus
Bulgaria inquinans
Burgundydrop Bonnet
Burnt Knight
Butter Cap
Butter Waxcap
Butterscotch Waxcap
Butyriboletus appendiculatus
Butyriboletus pseudoregius
Byssocorticium atrovirens
Byssocorticium efibulatum
Byssomerulius corium
Byssonectria deformis
Byssonectria fusispora
Byssonectria terrestris
Byssostilbe stilbigera