Infected leaves - under surfaces

Descrission:

Longitude (deg): -0.5. Latitude (deg): 51.4. Longitude (deg/min): 0° 30' W. Latitude (deg/min): 51° 30' N. Vice county name: Surrey. Vice county no.: 17. Country: England. Stage: Anamorph. Associated species: Potentilla anserina. Identified by: Malcolm Storey. Comment: epiphyllous back conidiomata of Marssonina state on red spots on leaves of Silverweed. Category: standard photograph or close-up. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.