Described by Hesler and Smith (1979) based on a Type collection from Idaho, USA.
Lactarius kauffmanii is a common milk cap, occurring in hemlock and fir forests across western North America.
Population is widespread, and no decline has been observed. We recommend it should be listed as Least Concern (LC).
Widespread in western North America, from the northern California coast and Cascade Range, through the Pacific Northwest, east into the Rocky Mountains, north into British Columbia, and southeast Alaska on the coast.
Lactarius kauffmanii is a common species with a widespread population; occurring in young to mature hemlock (Tsuga spp.) and fir (Abies spp.) forests. No decline has been observed.
Population Trend: Stable
Ectomycorrhizal with fir (Abies spp.), hemlock (Tsuga spp.) and possibly other conifers, Common in fall, in young to mature forests across northern California and the Pacific Northwest.
No threats have been identified with regards to this species.
No specific conservation actions is needed with regards to this species.
There is some variation with morphology of this species; modern taxonomic work and genetic sequencing delimit species parameters.
Hesler, L.R. & Smith, A.H. 1979. North American Species of Lactarius. University of Michigan Press: Ann Arbor, MI. 841 p.
iNaturalist. 2021. Available at: http://www.inaturalist.org
Methven, A.S. 1997. The Agaricales (Gilled Fungi) of California. 10. Russulaceae II. Lactarius. Mad River Press: Eureka, CA. 79 p.
MyCoPortal. 2021. Mycology Collections Portal. Available at: http://mycoportal.org
Siegel, N. and Schwarz, C. 2016. Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.