Hydnoporia (Pseudochaete, Hymenochaete) tabacina (Reddish-Brown Crust, Alder Glue)
Photo was taken at University of Wisconsin Arboretum, Madison
Photo was taken at Irvine Park, Chippewa County
Both photos (above & below) were taken at Schultz Fire Lane, Bayfield
Both photos (above & below) were taken at Indian Lake County Park, Dane County
Both photos (above & below) were taken at Merrimack Preserve
Both photos (above & below) were taken at OO Trailhead, Birke Trails, Cable