Ramariopsis pulchella 
Ravenels stinkhorn 
Red Banded Polypore 
Red Bog Bolete 
Red Brain Fungus 
Red Chanterelle 
Red Coral 
Red Edge Brittlestem 
Red Hot Milk Cap 
Red ring rot 
Red Stinkhorn Fungus 
Red-banded Cortinarius 
Red-belted Polypore 
Red-ring Rot 
Red-stipe bolete 
Reddening Lepiota 
Reddish brown bitter bolete 
Redlead Roundhead 
Redleg toughshank 
Resinomycena rhododendri 
Resinous Polypore 
Resupinatus alboniger 
Rhizopogon occidentalis 
Rhizoporus oligosporus