Caloboletus radicans, also known as the rooting bolete or whitish bolete, is a large, rare ectomycorrhizal fungus found in Europe under deciduous trees in summer and autumn. It has a pale buff or white cap, yellow pores and a stout stipe, and stains blue when bruised or cut. Bitter and inedible, it can cause severe vomiting and diarrhoea when eaten. Until 2014 it was known as Boletus radicans.