Gymnosporangium juniperi-virginianae Schwein.

Cedar-apple Rust
Juniper-apple Rust

Florida native

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Cedar-apple rust is a fungal disease that requires two different hosts - first a cedar and second a member of the rose family - to complete the life cycle of the fungus Gymnosporangium juniperi-virginianae.
The photographs here show the orange gelantized telia on an eastern red cedar tree in spring. Basidiospores released from these telia can only infect members of the rose family - Rosaceae - first causing yellow lesions on the leaves and later maturing into orange pustules.

Gymnosporangium juniperi-virginianae is a member of the Gymnosporangiaceae - Rust Fungi family.

iNaturalist profile for this species

For more information on this species, visit the following link:
Missouri Botanical Garden page for this species

Date record last modified: Jan 07, 2024