Boletus satanis

The name alone gives this rather obscene looking bolete a bit of a reputation. Notoriously poisonous, but not deadly, this mushroom favors oaks in the Autumn in California and Southern Europe. Some people even eat B. satanis after thorough cooking, but I don't recommend it. I find the smell to be rather disgusting, personally. Satanis can grow huge and obese, sometimes becoming football size. The cap is tan with an olive green tint, the pores range from blood red to orange in color, and the flesh stains blue when cut. The specimen pictured above was small and a bit old, so the blue-staining reaction was not as apparent.