Leaf Rusts of Hardwoods and Needle Rusts of Conifers
Cedar - Apple Rust - Gymnosporangium juniperi-virginianae
Cedar - Hawthorn Rust - Gymnosporangium globosum
Pycnia on top surface of apple and hawthorn leaves.
Aecia on bottom of leaf.
Telial horns starting to form on galls produced on juniper.
Fully formed telia on juniper.
Teliospores of Gymnosporangium.
Quince Rust - Gymnosporangium clavipes
Aecia on the fruits of Hawthorn cuased by Quince rust.
Telia of Quince rust produced on the main stem of juniper.
SEE also Gymnosporangium broom rust on "Broom Rust Web Page"