🇬🇧 willow rust fungus - 🇩🇪 Weiden-Rost - 🇷🇺 Мелампсора ивовая 6/7/26
🆔 Melampsora ari-salicina A. Raabe
ℹ️ Hymenium: Not formed as a cap-and-gill structure; spores produced in rust sori on infected willow leaves
ℹ️ Body: Microscopic rust fungus forming yellow-orange uredinia, later dark brown to black telia on leaves of Salix species
ℹ️ Hymenium Attachment: Not applicable; spore-producing sori erupt through or develop within host leaf tissue
🌿🌳 Ecology obligate biotrophic parasite on willows (Salix spp.); uredinia reinfect willow leaves during the growing season, telia develop later in summer to autumn
🤐 Inedible, microscopic plant pathogen
📏 Fruit body microscopic; visible only as small rust pustules or dark telial patches on leaves
📐 Sori usually minute, appearing as yellow-orange to brown-black spots or patches on willow leaves
🔪 No true flesh; infected leaf tissue may yellow, spot, brown or distort
🔬 Urediniospores one-celled, yellowish, finely echinulate to spiny; teliospores formed in dark telia on willow leaves
🔤 Willow rust producing yellow-orange summer sori and later dark telia on Salix leaves
🇬🇧 willow rust fungus - 🇩🇪 Weiden-Rost - 🇷🇺 Мелампсора ивовая