Herbarium specimen: Potamogeton perfoliatus
| Taxon: | Potamogeton perfoliatus L. ("Perfoliate Pondweed") named by Alfred Fryer 1892 |
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| Collected by: | William Barclay |
| Collection date: | 8/9/1892 |
| Locality: | Great Britain, VC88 Mid Perthshire, Kirkton, NO1019 |
| Institution: | Perth Museum and Art Gallery (PTH) |
| Accession number: | PTH.1999.420.8856 |
