Eryngium maritimum also called beach thistle. The plant is perennial and blooms with fine blue flowers. The plant is on the Danish red list of endangered plants and it is relatively rare in Denmark. It can be 25-60 cm high and grows on sandy shores. Insects love the plant’s flowers.

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This plant was in the past collected and used as a means to promote man’s fertility and potency. However, there is no scientific evidence of the effect.