Collection location: Howarth Park, Santa Rosa, Sonoma Co., California, USA [Click for map]
I don’t have a clue what this is. Well, I know it’s Boletus. Fruiting under oak, manzanita. There were two smaller ones, either connected to it or near, and buried under duff. Pileus, pores, stipe all turned dark blue when bruised. I don’t know enough to know if this is an old specimen.