Two rust fungi on wood anemone (Anemone nemorosa): Ochropsora ariae (white pustules) and Tranzschelia anemones (deformed leaves and dark brown spores).
Powdery mildew fungus (Phyllactinia fraxini) producing chasmothecia on European ash (Fraxinus excelcior).
Stem rust disease is caused by the fungus Puccinia graminis. Masses of teliospores are seen in the pictures above.
Powdery mildew (Podosphaera amelanchieris on Amelanchier lamarckii) chasmothecia with dichotomous appendages.