Infection - leaf under surface - highly enlarged

Descrission:

Longitude (deg): -3.8. Latitude (deg): 57.1. Longitude (deg/min): 3° 50' W. Latitude (deg/min): 57° 10' N. Vice county name: East Inverness-shire. Vice county no.: 96. Country: Scotland. Stage: Telia (III). Associated species: Melampyrum pratense ssp pratense. Identified by: Malcolm Storey. Comment: Telia on Common Cow-wheat. Category: macro-photograph. Image scaling: highly enlarged. Photographic equipment used: Nikon D100 dSLR with Tamron SP T90 AF Macro 1:1 lens.