I've taken pics of a growth on a medium sized re-leafed tree where I live. Actually, it has two on it. I noticed them in the spring and have watched as they've grown in size. For lack of a better description, since I don't see a place here to include the pics, the growths look like someone took a piece of dog poop and molded it around the limb of the tree. It's blackish in color with white spots throughout. Do you have any idea what this may be? The bigger of the two is about 5-6 inches on the limb and about 1.5 inches in width.