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Helianthus tuberosus L.

Flora Europaea the original Linnean specimen         'Jerusalem Artichoke' or 'Sunroot' is a strongly invasive North American meadow-steppe species acting like a beautiful but very successful ruderal. Formerly cultivated. Valeni near Caianu Vama, Cluj county, 3rd of October 2010. dr. Alexandru Badarau, alexandru@transsilvanica.net