Lactarius kauffmanii is a species of mushroom in the family Russulaceae. It is found in Western North America.
Taxonomy The species was described as Lactarius kauffmanii in 1979 by the American mycologists Lexemuel Ray Hesler and Alexander H. Smith.
Etymology The species is named for Calvin Henry Kauffman who collected specimens on his expedition to Lake Cushman, Washington in 1915.
Description The cap of Lactarius kauffmanii is tan to grayish brown in color and about 4-15 centimeters in diameter. It becomes browner in color as it gets older. It is convex to flat and sometimes depressed. The gills are pale to pinkish and adnate to subdecurrent. The stipe is white or cream to tan in color and becomes ochre or orange as the mushroom gets older. The spore print is white to creamy. When cut, this mushroom produces large amounts milky white latex. This latex leaves orangish tan stains. This mushroom has an acrid taste.
Habitat and ecology Lactarius kauffmanii is mycorrhizal. It grows under hemlock and fir. It may also grow with other types of conifers. It is found in forests.
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