Rust fungus Chrysomyxa pyrolae on the underside of leaves ...

The image depicts a close-up view of rust fungus Chrysomyxa pyrolae infecting shinleaf (Round-leaved Wintergreen, Pyrola rotundifolia) leaves on Lenin Trail near Dibuny, north-west from Saint Petersburg, Russia.

In the foreground, two large dark green shinleaf leaves with numerous small round orange dots are visible. The rounded leaf edges and veins of these leaves are characteristic features of Round-leaved Wintergreen (Pyrola rotundifolia). A single smaller shinleaf leaf is also present in the middle ground, while a few long, light brown, dead grass-like plant stalks are scattered throughout the image.

The rust fungus Chrysomyxa pyrolae produces numerous small round orange dots on the underside of leaves. These spores are produced by fungi that infect plants and can cause disease. The fungal infection appears to be widespread across the two large shinleaf leaves in this image, with many infected areas visible.

In the middle ground, a single smaller Round-leaved Wintergreen leaf has been curled up at its base, possibly due to the rust fungus infection. It is unclear if this plant is also infected by Chrysomyxa pyrolae or if it has died from some other cause.

The background of the image consists of long dead grass-like stalks. These are likely from plants that have already died and been replaced by new growth, possibly due to the rust fungus infection.

Overall, the image provides a detailed view of the rust fungus Chrysomyxa pyrolae infecting Round-leaved Wintergreen leaves on Lenin Trail near Dibuny, north-west from Saint Petersburg, Russia. The widespread infection is evident across two large shinleaf leaves and a smaller curled up leaf in the middle ground. – AI vision