Polemonium 1a Flinck's Garden, Bjuv Sk 140518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium 1b Flinck's Garden, Bjuv Sk 140518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium 1d Flinck's Garden, Bjuv Sk 140518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium 1e Flinck's Garden, Bjuv Sk 140518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 6 Kautokeino, Troms-Finnmark, Norway 220722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 8 Kautokeino, Troms-Finnmark, Norway 220722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 1 Battfjellet, Svalbard 790721 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 10 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 2 Battfjellet, Svalbard 790721 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 3 Battfjellet, Svalbard 790721 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 4 Gangdalen, Svalbard 790717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 8 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 9 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 11 Lund Bot Garden 110617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 2 Lund Bot Garden 110617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 3 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 5 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 6 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 8 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 9 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium coeruleum 4 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium coeruleum 5 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium reptans 2 (cult) Sölvesborg, Blekinge 150608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 7 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium 1c Flinck's Garden, Bjuv Sk 140518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 1 Luopakte, Torne Lappmark 110730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 2 Luopakte, Torne Lappmark 110730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 3 Luopakte, Torne Lappmark 110730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 4 Luopakte, Torne Lappmark 110730 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 5 Kautokeino, Troms-Finnmark, Norway 220722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium acutiflorum 7 Kautokeino, Troms-Finnmark, Norway 220722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 11 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 12 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 13 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 14 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 5 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 6 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale 7 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale x caeruleum 1 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium boreale x caeruleum 2 Bygøynes cemetery, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 1 Lund Bot Garden 110617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 10 Lund Bot Garden 120908 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 4 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium brandegei 7 Lund Bot Garden 120615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

Polemonium coeruleum 6 Bad Gastein, Austria 080701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium reptans 1 (cult) Sölvesborg, Blekinge 150608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 1 Lund Bot Garden 140521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 2 Lund Bot Garden 140521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 3 Lund Bot Garden 140521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 4 Lund Bot Garden 140521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 5 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Polemonium viscosum 6 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).