Lactarius chelidonium is a member of the large milk-cap genus Lactarius in the order Russulales. It was first described by American mycologist Charles Horton Peck in 1870.

Charles Horton Peck was an American mycologist of the 19th and early 20th centuries. He was the New York State Botanist from 1867 to 1915, a period in which he described over 2,700 species of North Am