Very rusted leaves of aspen Populus tremula
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Rust on polars seems to have been particularly severe this year, I noticed a tree (a large leaved poplar) in Simpson that has lost almost all its leaves due to severe rust infection.
If you say so. I got this name from the internet, so please propose the correct name if you think that you know it.
University of Edinburgh and Biodiversity Observatory (OU)
It just seems to be a more frequently recorded possibility than Melampsora allii-populina. I don't think they can be told apart without microscopy.
Lat/Lng: 52.007333333333, -0.717
OS grid ref: SP881350