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Denchev, T. T.; Denchev, C. M.; Kemler, M. . Entyloma ratibidae (Entylomataceae), a New Smut Fungus on Ratibida Pinnata (Asteraceae) from USA Based on Molecular Analyses, Comparative Morphology, and Host Specificity. Phytotaxa 2025, 726, 85-94.