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Potamogeton perfoliatus L.
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 | Hjertebladet vandaks |  | Clasping-leaved pondweed |  | Durchwachsenes laichkraut |  | Ålnate |  | Hjartetjønnaks |
 | Hjartanykra |  | Ahvenvita |  | Potamot perfolié |  | Rdestnica przeszyta |  | Doorgroeid fonteinkruid |
 | Brasca arrotondata |  | Serralha-de-folha-redonda |  | Červenavec prerastenolistý |  | Kaelus-penikeel |  | Rdest prorostlý |
 | Hjartatjarnaks |  | 穿叶眼子菜 |  | Dristavec preraslolistni |  | Dréimire uisce |  | נהרונית לופתת |
 | Dyfrllys trydwll |
Carl Axel Magnus Lindman: Bilder ur Nordens Flora; Tavl. 487 |
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