Irpex lacteus 

Irpex lacteus 9684

Irpex lacteus (Fries) Fries 

Resupinate, toothed. White rotter on hardwoods. A pale cream resupinate crust fungus with poroid teeth that split and become flattened. It can be found on the side of and underneath hardwood branches and logs. When growing on the sides of wood, it can produce a small, thin, velvety, zoned white lateral cap with an an irregular margin. These are frequently seen growing in long rows.  Occasionally found on conifers. It is a saprotrophic white rotter of sapwood. On live trees, such as cherry, it can be parasitic. This is in the Meruliaceae family of the Polyporales order.