Melampsora laricis-populina on Populus × canadensis: a. Urediniospores with strongly thickened walls at the equator and smooth apex; b. Paraphyses with above strongly thickened walls; size of an urediniospore in comparison; c. subepidermal telium in vertical section; d. Teliospores with scarcely thickened walls at the apex; e. Telia epiphyllous; (a–d from Klebahn 1914: 766; e by Julia Kruse).

 
 
  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