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Pustules of white rust,
Puccinia horiana,
on the underside of a garden mum,
Chrysanthemum grandiflora,
leaf.
Pustules of white rust,
Puccinia horiana,
on the underside of a garden mum,
Chrysanthemum grandiflora,
leaf. Credit: Steven T. Koike
Pustules of white rust, Puccinia horiana, on the underside of a garden mum, Chrysanthemum grandiflora, leaf. Credit: Steven T. Koike
