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It is a herbaceous annual or perennial plant generally found in slow flowing streams, ponds, or lakes. The daisy-like flowers are white with a yellow centre, with five petals. It is similar in form to Ranunculus fluitans (river water-crowfoot), apart from flower petal number, thread-leaved has on 5 petals and shorter leaves, as thread-leaved prefers slower flowing waters. It also has rounded seed heads which become fruits covered with bristles. The segmented leaves and the plants ability to photosynthesis underwater have been studied.
Distribution and habitat
The plant is found in most of the Northern Hemisphere, from the United States, Europe and the Mediterranean, east through Siberia, the Caucasus, the Middle East, the Himalayas, Kazakhstan and Mongolia to Kamchatka in Russia, also in Japan, China and Korea. It is even found in the lakes and ponds of Mount Everest.
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