 The species was first described scientifically by French botanist Jean Baptiste François Pierre Bulliard in his 1788 Herbier de la France . Later synonyms include Boletus constrictus by Christian Hendrik Persoon in 1801 , Leccinum constrictum by Samuel Frederick Gray in 1821 , Suillus cyanescens by Petter Karsten in 1882 , and Leucoconius cyanescens by Günther Beck von Mannagetta und Lerchenau in 1923 . The variety violaceotinctus was described by Roy Watling in 1969 from collections made in Michigan , USA . 
