Growing on the upper surface of bramble leaves in one place in Brede High Woods, East Sussex
No identification made yet.
No interactions present.
This looks like Phragmidiumn rubi-idaei which normally grows on raspberry, but this was on blackberry. Grove in The British Rust Fungi says, however, "possibly on other species of the
Lat/Lng: 50.953, 0.5489
OS grid ref: TQ791201