closeup on a spiky man-trefoil thistle, eryngium giganteum

biodiversity umbellifers thistlelike mantrefoil herbaceous wildflower giganteum botanical perennial eryngium apiaceae caucasus willmott outdoors wildlife closeup thistle natural biology blossom trefoil prickly foliage nature flower single garden botany season summer spiky flora plant ghost green macro sharp peaky iran miss wild blue head 039 man