Sagittaria sagittifolia · strėlialapė papliauška

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• Gewöhnliches Pfeilkraut
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https://en.wikipedia.org/wiki/Sagittaria_sagittifolia The round tuber is edible. It tastes bland, with a starchy texture, similar to a potato but somewhat crunchier, even when cooked. It is even cultivated as a food crop in China, Japan.

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