Eryngium agavifolium 3 (cult) Brunnby Sk 060801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium agavifolium 4 Copenhagen Bot Garden 080710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium alpinum 2 (cult) Villar d'Arène FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium alpinum 5 (cult) Villar d'Arène FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium alpinum 6 (cult) Villar d'Arène FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium billardierei 2 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium billardierei 3 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium billardierei 4 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 2 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 3 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 6 Lund Bot Garden 160704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 7 Lund Bot Garden 160704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 10 Partheno Dasos, Rodhopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 11 Partheno Dasos, Rodhopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 6 Partheno Dasos, Rodhopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 7 Partheno Dasos, Rodhopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 8 Partheno Dasos, Rodhopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 9 Partheno Dasos, Rodhopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium giganteum 2 Häljarp, Saxtorp, Skåne 950730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium maritimum 1 Klitmöller, Jylland 950807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium maritimum 2 Byrums Sandvik, Böda, Öland 860822 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium maritimum 4 Ängelsbäcksstrand, Grevie Sk 170807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium maritimum 5 Ängelsbäcksstrand, Grevie Sk 170807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium palmatum 1 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium palmatum 2 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium palmatum 3 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium palmatum 4 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium planum 1 Lund Bot Garden 130816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium planum 3 Lund Bot Garden 130816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium planum 5 Lund Bot Garden 130816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium tricuspidatum 1 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium tricuspidatum 2 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium yuccaefolium 2 (cult) Brunnby Sk 060801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium agavifolium 1 Copenhagen Bot Garden 080710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium agavifolium 2 Copenhagen Bot Garden 080710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium alpinum 1 (cult) Villar d'Arène FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium alpinum 3 (cult) Villar d'Arène FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium alpinum 4 (cult) Villar d'Arène FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium amethystinum 1 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium amethystinum 2 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium billardierei 1 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 1 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 4 Lund Bot Garden 160704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium bourgatii 5 Lund Bot Garden 160704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 1 NW of Straznice, Czekia 950701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 2 Vaggeryd, Småland 990630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 3 sawmill W of Vaggeryd, Byrum, Småland 150803 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 4 sawmill W of Vaggeryd, Byrum, Småland 150803 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium campestre 5 Comboire FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium giganteum 1 Häljarp, Saxtorp, Skåne 950730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium giganteum 3 Häljarp, Saxtorp, Skåne 950730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium maritimum 3 Valbjerg Sande, Jylland 060806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium palmatum 5 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium planum 2 Lund Bot Garden 130816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium planum 4 Lund Bot Garden 130816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Eryngium yuccaefolium 1 (cult) Brunnby Sk 060801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).