Poplar and willow.
Usually found at the base of the tree. Seldom up the stem.
Annual cap. Generally develop in clusters. Begin as small whitish caps that become more beige-brown with age often cracking and hardening on the cap. Gills whitish brown that stain brown with age.
Considered saprotrophic. Associated with a white rot of wood. May result in the failure of the host tree at the butt or root plate.