Categories David Autumn fungi: birch boletes Post author By David Post date 17 November 2018 A common autumn fungus, birch boletes have a rich dark brown coloured cap with pores rather than gills on the underside, and lines of scales on the stem. Grow, as the name implies, in association with birch trees. ← Wary heron, Doxey Marshes → Retreating male pheasant