NVDHPHOTOGRAPHY©: Feeling natural at the dunes – Hook of Holland

The sea holly, Eryngium maritimum, is a species of Eryngium in the plant family Apiaceae and native to most European coastlines. It resembles a plume thistle in that its flower is burr-shaped, but the flowers are metallic blue rather than mauve. Protected from winds this dune plant grows to a height of 20 to 60 cm.