blue eryngo - herbaceous perennial thistle

angiosperms apiaceae apiales asia asterids beautiful beauty bloom blossom blue botany bracts branched central closeup conical eryngium eryngo eudicots europe family flat flora floral flower flowerheads flowering genus green growing herb herbaceous herbs holly kingdom leaf medicinal medicine natural nature numerous order outdoor perennial plant plantae planum purple sea silveryblue small southeastern spiky stems summer thistle traditional wild