Herbarium sheet, rigid hornwort, Ceratophyllum demersum, found at Loch Rescobie, Angus, Scotland, 1844

Herbarium sheet, rigid hornwort, Ceratophyllum demersum, found at Loch Rescobie, Angus, Scotland, 1844
Herbarium sheet, rigid hornwort, Ceratophyllum demersum, found at Loch Rescobie, Angus, Scotland, 1844