Photo: Eryngium planum 14.

Flowering tops, all blue. Annala, Helsinki, Finland. Planted. 2007-09-11.
Eryngium planum L. Engl.: blue eryngo, flat sea holly, plains eryngo. Deu.: Flachblättriger Mannstreu. Suom.: sinipiikkiputki, siniputki. Sven.: rysk martorn, daggtorna
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Photo: Eryngium planum 14.