
Cronartium quercuum (the Pine-oak rust) is a fungus causing damage to both Pine trees (Pinus) and broad leafed trees in the family Fagaceae, most notably Oak (Quercus).
Similar species: Pucciniales
By Matthew Beziat
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Uploaded Jan 26, 2021. Captured Jan 26, 2021 11:14 in Wildflower Trail, Millersville, MD 21108, USA.