blackberry orange rust

Gymnoconia peckiana

Member of family Phragmidiaceae
rust fungi (order Pucciniales)
basidiomycete fungi (phylum Basidiomycota)
fungi including lichens (kingdom Fungi)

Caution: There may be other wild species of this genus not yet included in this guide.

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• The Plant Disease Diagnostic Clinic at Cornell says that this species should be split across two genera, but is unfortunately vague about the hosts for each.
• Arthuriomyces peckianus infects “black raspberry”.
• Gymnoconia nitens is “more common” on “blackberry”.

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Chris’s observations: 2 (all are research grade)

Locations:

• Castle Rock SP
• Russian Ridge OSP

Months:

• Apr.: 1
• May: 0
• Jun.: 1

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Taxon info: iNaturalist

Bay Area species: iNaturalist