Growing on a live deciduous tree, couldn't ID tree, just barely begun to bud in the first week of May.
Saw a lot of thes pure white spongy FB all torn up, knocked off of fallen, very dead, large deciduous trees along the trail. Seems like it must've been messed with by some sort of critter (humans included). Second photo is an attachment. Hand sample is the most intact bit I've found. Must've been very large FB or FBs.