(Lactarius rufus.)512.

This is one of the most deadly of all British fungi, and generally grows in fir woods; the white milk is singularly acrid and corrosive, which is perhaps its best distinguishing mark. It bears some resemblance to fig. 26, Edible Sheet, but the milk of the L. volemum is mild, and changes colour to dark brown when exposed to the action of the air; whilst in L. rufus it remains white, and the milk is highly pungent.