Journal
MYCOLOGIA
Volume 106, Issue 3, Pages 448-455Publisher
ALLEN PRESS INC
DOI: 10.3852/12-260
Keywords
Anemone; Prunus; Pucciniales; Tranzschelia arthurii; T. mexicana; T. pseudofusca
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Two new species of Tranzschelia (Pucciniales) are described from the Americas. Tranzschelia pseudofusca is a microcyclic species on Anemone spp. (Ranunculaceae) with North American distribution. T. mexicana on Prunus salicifolia (Rosaceae) is found in Colombia, Ecuador and Mexico. It is assumed that T. mexicana is a macrocyclic host-alternating species. T. thalictri, a holarctic microcyclic species, has variable morphology and probably is an aggregate of related species. Specimens are documented with scanning electron microscopy (ESEM) and light microscopy including a simple new technique to illuminate urediniospore germ pores. Results are discussed with respect to similar species, distribution and life-cycle characters. A key for American species on telial hosts is provided.
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