Frond - under surface - close-up showing sori - enlarged

描述：

Longitude (deg): -0.6. Latitude (deg): 54.3. Longitude (deg/min): 0° 40' W. Latitude (deg/min): 54° 20' N. Vice county name: North-east Yorks. Vice county no.: 62. Country: England. Stage: Fertile sporophyte. Identified by: Malcolm Storey. Category: macro-photograph. Image scaling: enlarged. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.