Habitat: Associated with larch.

Conservation Status: Not of concern

grayish larch bolete

Suillus viscidus (= Suillus laricinus and S. aeruginascens) is a larch-associated species with a viscid to slimy, gray to olive brown or darker cap, the edge of which sometimes is adorned with bits of veil tissue. The tubes and pores are whitish to gray, not yellow as in most suilluses, and stain blue when bruised. The stipe is whitish above the slight ring or ring-zone. The lower stipe is viscid and similar in color to the cap. The flesh is white to yellowish and stains blue when bruised or cut. Interestingly, S. viscidus stains waxed paper or white office paper blue. Look for it in late summer and fall. It has sometimes been placed in the genus Fuscoboletinus.