Tranzschelia discolor on Prunus: a. Urediniospore with apically thickened wall and two paraphyses; b. Teliospore; the lower cell is narrower and the ornamentation is less distinct; the wall of the upper cell is apically thickened; (a, b edited after Viennot-Bourgin 1949: 1119, under T. pruni-spinosae, with permission from Elsevier France).

 
 
  Part of: Zwetko P, Scheuer C, Krisai-Greilhuber I, Blanz P (2024) Rust fungi of Austria 1 (excluding Puccinia s.l. and Uromyces): Melampsoraceae and related families, Gymnosporangiaceae, Ochropsoraceae, Phragmidiaceae, Tranzscheliaceae, and Genera incertae sedis. Biosystematics and Ecology 3: e123592. https://doi.org/10.1553/biosystecol.3.e123592