Infected leaf - underside - white background

Descrição:

Longitude (deg): -1.4. Latitude (deg): 53.3. Longitude (deg/min): 1° 30' W. Latitude (deg/min): 53° 20' N. Vice county name: Derby. Vice county no.: 57. Country: England. Stage: Infection. Associated species: Polygonum bistorta. Identified by: Malcolm Storey. Comment: marginal lesions on leaves of Bistort. Category: standard photograph or close-up. Background: white background. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.