Centranthus angustifolius 10 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 11 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 12 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 13 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 15 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 18 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 4 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 5 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 6 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 8 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus calcitrapae 4 Gibraltar GB 120321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus calcitrapae 5 Gibraltar GB 120321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus macrosiphon 1 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus macrosiphon 2 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 6 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 1 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 14 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 16 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 17 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 2 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 3 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 7 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus angustifolius 9 Les Freaux near La Meije FR 150706 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus calcitrapae 1 Grazalema, Andalusia SP 120325 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus calcitrapae 2 Ojén, Andalusia SP 120319 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus calcitrapae 3 Ojén, Andalusia SP 120319 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus calcitrapae 6 Gibraltar GB 120321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 1 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 2 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 3 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 4 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 5 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 7 Kovan Kaya Natural Monument, Bulgaria 120511 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 8 Kovan Kaya Natural Monument, Bulgaria 120511 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Centranthus ruber 9 Kovan Kaya Natural Monument, Bulgaria 120511 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).