Fertile and sterile stems - pale background

Description:

"Longitude (deg): -5.3. Latitude (deg): 55.5. Longitude (deg/min): 5° 20' W. Latitude (deg/min): 55° 30' N. Vice county name: Clyde Islands. Vice county no.: 100. Country: Scotland. Identified by: Malcolm Storey. Photo summary: ""in situ, close-ups, stem cross-section, spores"". Comment: growing in small river near sea. Detail to note: varying number of branches. Category: standard photograph or close-up. Background: pale background. Photographic equipment used: Canon EOS400D dSLR + Sigma 50mm 1:1 macro lens. "