Cedar-Apple Rust Gall (Gymnosporangium juniperi-virginianae) - 2ND YEAR - with spore horns on a Red Cedar. - previous pic shows 1st year gall
4/24/10 WWW4 in VA
It takes two years for the life cycle of this Rust.
The first year come the dark brown, roundish, galls that grow from spores (see previous picture).