Lactarius deterrimus Gröger. Bitterer Milchling, False Saffron Milkcap. Very similar to L. deliciosus and formerly not distinguished from it. It differs essentially in the flesh, where coloured by the milk, becoming purplish in ten minutes and dark dull wine-red in about thirty minutes after exposure, and by the milk being bitter. The cap colour is less reddish and more yellowish and the whole fungus is more liable to turn greenish. Habitat mainly under spruce but also pines. Frequent. Less good to eat than L. deliciosus. (Never eat any mushroom until you are certain it is edible as many are poisonous and some are deadly poisonous.)
Found In Europe.