blue eryngo sea holly eryngium planum

acids amongst antibacterial antifungal apiaceae apiales asterids background bioactive blue bokeh bracts burr compounds conical diuretic eryngium eryngo essential flat flavonoids flowerhead flowers focus folk glitter green herbaceous hobbit holly large long many medicinal medicine metallic oils one perennial phenolic plant planum saeson sea shape silvery soft spiky stems summer thistle used