blue `serbian sea holly` flower - eryngium serbicum pancic

apiaceae apiales arboretum august balkan bloom blossom blue botanical botanist botany bulb edeldistel eryngium europe flora florist flowers gallen garden head holly leaf nature pancic plants prickly purple saint sea seaholly serbia serbian serbicum serbische silver spike spiky spine summer swiss switzerland thistle thorn thorny top umbelliferae violet yugoslavia