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2011-05-11 Vienna XXII. district, Lobau - Danube National Park (155 msm Quadrant 7864/2). German name: Nessel-Teufelszwirn, Nessel-Seide; Gross-Brennnessel It does not look very cozy, but it is the preferred 'nursery' for parasitic Cuscuta europaea: here, two (!) young seedlings already are climbing the spiky stalk of one Urtica dioica; a couple of weeks later there were already a dozen of them on most stinging nettles growing on this place. See also links below to more photos from the same place.