summer background with blue blooming plant. eryngium planum, the blue eryngo or flat sea holly flowers

summer background blue blooming plant eryngium planum eryngo flat sea holly flowers garden close soft focus wallpaper gardening thorny leaves medicinal selective bokeh environment outdoor flower bluehead horticulture decorative insectfriendly thistlelike nature umbels flowering plants giganteum silver herbaceous perennial branch spiky prickly nectar source thistle spikes maritimum heads silvery foliage vegetation angiosperm inflorescence sharp purple beefriendly botany