Abstract

ABSTRACTPuccinia telimutans is described as a new species of rust fungi (Basidiomycota, Pucciniales) and causal agent of Mexican potato rust disease of the endemic wild potatoes Solanum demissum and S. verrucosum from Mexico. It is microcyclic and produces telia that show a unique succession of one-celled, catenulate teliospores that germinate upon maturity, followed by resting teliospores that are pedicellate and two-celled. Puccinia telimutans appears to be restricted to Mexico and has formerly been confused with P. pittieriana, which causes common potato rust in South America.

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