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Four flowering plants, including cuckoo-pint, sweet flag and two pondweeds. Chromolithograph by W. Dickes & co., c. 1855.

Three types of pondweed (Potamogeton species). Coloured engraving by J. Pass, c. 1825.

Fennel-leaved pondweed (Potamogeton pectinatus): flowering stem, root and floral segments. Coloured engraving after J. Sowerby, 1795.

Seven aquatic flowering plants, all types of pondweed (Potamogeton species). Chromolithograph by W. Dickes & co., c. 1855.

Fennel-leaved pondweed (Potamogeton pectinatus) with an associated beetle and its anatomical segments. Coloured etching, c. 1831.

Pondweed (Potamogeton sp.): flowering and fruiting stems rising from water. Coloured etching by M. Bouchard, 177-.

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Potamogeton

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Four flowering plants, including cuckoo-pint, sweet flag and two pondweeds. Chromolithograph by W. Dickes & co., c. 1855.

Pondweed (Potamogeton sp.): flowering and fruiting stems rising from water. Coloured etching by M. Bouchard, 177-.

Fennel-leaved pondweed (Potamogeton pectinatus): flowering stem, root and floral segments. Coloured engraving after J. Sowerby, 1795.

Fennel-leaved pondweed (Potamogeton pectinatus) with an associated beetle and its anatomical segments. Coloured etching, c. 1831.

Three types of pondweed (Potamogeton species). Coloured engraving by J. Pass, c. 1825.