Macrochemical reactions of species in the family Boletaceae
Macrochemical reactions are reported on 15 species of Suillus, 3 of Fuscoboletinus, 2 of Gyroporus, and 1 species each of Boletellus, Boletinellus, Pulveroboletus, and Strobilomyces, together with a number of tests on species of Tylopilus and Boletus not available for an earlier paper. Three species of Suillus and three Boletus species are new records for Nova Scotia, and two of these are new for Canada. Also included are tests for a new species of Boletus to be described in another paper.Similarities in the macrochemical tests are used to divide 13 of the species of genus Suillus into two groups. Suillus luteus was selected as the type for group 1 and S. americanus for group 2. Two species did not belong to either group and were distinctly different from each other. Two species of Fuscoboletinus could be placed with group 2, but the third, F. paluster, differed widely. Boletus piperatus, which has been placed in Suillus by some authors, does not appear to be related on the strength of these tests. No attempt was made to group other species in Boletus or Tylopilus.