Herbarium sheet, bog pondweed, Potamogeton polygonifolius, found on the south end of Bleak Down, Godshill, Isle of Wight, 1860

Herbarium sheet, bog pondweed, Potamogeton polygonifolius, found on the south end of Bleak Down, Godshill, Isle of Wight, 1860
Herbarium sheet, bog pondweed, Potamogeton polygonifolius, found on the south end of Bleak Down, Godshill, Isle of Wight, 1860