The following lesson is a simplified adaptation of Hessler and Smith’s book on NA species of Lactarius (1979).  It is inspired by Gary Lincoff’s Mushroom University course on Russulas and Lactarius and has been updated by me to account for recent DNA research showing that Lactarius is not a monophyletic genus. Closely related to Lactarius are two additional genera: Lactifluus and Multifurca. Most species of Lactifluus are tropical and include pleurotoid species that are saprotrophic and grow on wood. The type species for Lactifluus is Lactifluus piperatus (see slide 10), formerly the type species for Lactarius. The new type species for Lactarius is Lactarius torminosus (see slide 51).

Kindly click on the first slide to view in full screen mode and progress through them all to the end.