Infection on leaf under surface - close-up - enlarged

Description :

Longitude (deg): -1.2. Latitude (deg): 51.4. Longitude (deg/min): 1° 20' W. Latitude (deg/min): 51° 20' N. Vice county name: Berks. Vice county no.: 22. Country: England. Stage: Anamorph and Teliomorph. Associated species: Acer pseudoplatanus. Identified by: Malcolm Storey. Comment: on senescent Sycamore leaves. Category: macro-photograph. Image scaling: enlarged. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.