Irish wildflowers

Fen Pondweed, Potamogeton coloratus
Photos: Rinecaha, the Burren

Fen Pondweed
Potamogeton coloratus
Liach eanaigh
Family: Potamogetonaceae

Flowering June - July. Aquatic perennial. Native.

Very small flowers with four perianth segments and stamens. Separate carpels ripening to small nutlets. Narrow submerged leaves. Floating leaves are oval to elliptical-lanceolate, +/- translucent with clearly visible cross-veins.

Occurs in shallow water in calcareous fens and peaty ditches. Most frequent in central Ireland.

Similar: Bog Pondweed, P. polygonifolius
     


Fen Pondweed, Potamogeton coloratus
Fen Pondweed, Potamogeton coloratus. The Burren, July 2009

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