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Diseases and Fungi with Images
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Gymnosporangium juniperi-virginianae (Cedar-Apple Rust) (left)
Gymnosporangium globosum (Hawthorn Rust) (Right)

Pycnia on hawthorn leaf (Cedar-Hawthorn Rust / Gymnosporangium globosum)

Aecia on bottom of leaf — Gymnosporangium rust

Aecia on bottom of leaf — Gymnosporangium rust

Cedar-Apple (Gymnosporangium juniperi-virginianae) gall on Juniper

Telia on Juniper Galls (Gymnosporangium family)

Fully expanded telia on Juniper (Gymnosporangium family)

Teliospores of Gymnosporangium

Teliospores producing basidiospores of Gymnosporangium

Quince Rust (Gymnosporangium clavipes)

Aecia on hawthorn from Quince Rust (Gymnosporangium clavipes)

Telia on Juniper from Quince Rust (Gymnosporangium clavipes)

Telia on Juniper from Quince Rust (Gymnosporangium clavipes)

Cross Section of Juniper with Quince Rust (Gymnosporangium clavipes)

Red Star Rust - Gymnosporangium yamadae

Poplar Leaf Rust -Melampsora medusa

Uredinia sori on poplar leaf from Poplar Leaf Rust (Melampsora medusa)

Uredinia on poplar leaf from Poplar Leaf Rust (Melampsora medusa)

Telia on bottom of poplar leaf from Poplar Leaf Rust (Melampsora medusa)

Telia on Poplar Leaf from Poplar Leaf Rust (Melampsora medusa)

Aecia on Fir caused by Poplar Leaf Rust (íMelamprosa medusa)

Willow Rust on goldenrod (Melmpsora family)

Pycnia of Red Pine Needle Rust (Coleosporium asterum)

Aecia of Red Pine Needle Rust (Coleosporium asterum)

Peridium caused by Red Pine Needle Rust (Coleosporium asterum)

Uredinia on aster caused by Red Pine Needle Rust (Coleosporium asterum)

Uredinia on goldenrod caused by Red Pine Needle Rust (Coleosporium asterum)

Uredinia (bottom leaf in photo) and telia (top leaf in photo) on golden rod leaves caused by Red Pine Needle Rust (Coleosporium asterum)

Juniper Broom Rust - Gymnosporangium nidus-avis

Telia of Juniper Broom Rust (Gymnosporangium nidus-avis)

Dried Telia of Juniper Broom Rust (Gymnosporangium nidus-avis)

Telia of Juniper Broom Rust (Gymnosporangium nidus-avis)

Telia of Juniper Broom Rust (Gymnosporangium nidus-avis)

Juniper Broom Rust (Gymnosporangium nidus-avis) on Serviceberry

Pycnia of Juniper Broom Rust (Gymnosporangium nidus-avis) on Amelanchier leaves

Aecia of Juniper Broom Rust (Gymnosporangium nidus-avis) on Amelanchier leaves

Fir Broom Rust (Melampsorella caryophyllacearum)

Pycnia and Aecia of Fir Broom Rust (Melampsorella caryophyllacearum) on Balsam

Pycnia (black) and aecia (white) of Fir Broom Rust (Melampsorella caryophyllacearum)

Chickweed with uredinia of Fir Broom Rust (Melampsorella caryophyllacearum)

Spruce Broom Rust - Chrysomyxa species

Spruce Needle Rust - Chrysomyxa species

Aeciospores from Spruce Needle Rust

Aarmillaria infected trunk base

Armillaria Fungus