Melampsora on Hypericum. a. Melampsora sp. (Caeoma sp.) on Hypericum calycinum, aeciospores; b, c. Melampsora hypericorum on Hypericum montanum; b. Aeciospores; c. Aecia. M. hypericorum has smaller aeciospores (16–19 × 13–17 µm) with thinner walls and finer warts. Scale bar: 10 µm; (a, b from Poelt and Zwetko 1991: 68; c 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