Tag Archives: Gymnosporangium clavipes

Serviceberry Galls

Gymnosporangium clavipes is a widespread rust (fungus) that infects over 480 species in 11 genera. Also called cedar quince/hawthorn rust, G. clavipes is heteroecious, meaning that it requires two alternate hosts to complete it life cycle. One host, various members … Continue reading

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Cedar Quince/Hawthorn Rust

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The cedar quince/hawthorn rust (Gymnosporangium clavipes) is heteroecious, that is, it requires two different host species to complete its life cycle. The cedar quince/hawthorn rust winters as a stem gall on a juniper or a cedar host – its primary … Continue reading

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