Oxbow Lakes - Bayous - Kolk Ponds
Almost 100 years after the Oder's regulation, there are still former, disconnected sections of the now rectified river in many spots on the polders and all along the stream. Around the end of April the intensely yellow blossoms of the marsh euphorbia (Euphorbia palustris) stand out around the edges of these pond-like bodies of water. By mid May the white blossoms of the water-crowfoot (Ranunculus aquatilis) grace these kolk lakes, soon to be accompanied by the inconspicuous underwater blossoms of the pondweed (Potamogeton). Early summer is the time to admire the pink blossoms of the magnificent flowering rush (Butomus) along the waters edge. In summer some of the kolk ponds are covered with a thick layer of white lotus (Nymphaea alba), at times interspersed with yellow water-lily (Nuphar lutea). The yellow blossoms of the British yellowhead (Inula britannica), the blue flower spikes of the Veronica longifolia, the small pink blossoms of of the red hot cat's tail (Acalypha hispida), and the white blossoms of the silver spray yarrow (Achillea cartilaginea), mixed with many grasses and sedges make for a colorful sight.