Eryngium

These architectural, spiny, almost sculptural-looking superficially like thistles, can make a dramatic statement. Eryngium is also known as sea holly: they grow well in coastal areas and have spiny leaves and a characteristic ruff around the flowerheads. With eye-catching blue thistle-like foliage Eryngiums make good winter silhouettes and the flower heads are great for cutting and using in fresh and dried arrangements.