The spots on the top surface of the leaves are due to spores coming from cedar trees - the fungal stage at the bottom surface of the leaf opposite the same spot is the stage which produces spores which infect cedar trees.

The spots on the top surface of the leaves are due to spores coming from cedar trees - the fungal stage at the bottom surface of the leaf opposite the same spot is the stage which produces spores which infect cedar trees.

Small, dark spore-producing bodies called "pycnia" on the upper surface of infected spots.

Spore-producing bodies called "aecia" on the lower surface of infected spots.

The size of the spots is in relation to how many spots are on the leaf.

The size of the spots is in relation to how many spots are on the leaf.

The size of the spots is in relation to how many spots are on the leaf.

Spore-producing bodies called "pycnia" on the upper surface on infected spots.