Micranthes 1d Bot Garden, Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes foliolosa 3 Riksgränsen, Torne Lappmark 110731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes foliolosa 4 Riksgränsen, Torne Lappmark 110731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 10 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 12 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 9 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 5 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 6 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 7 Battfjellet, Svalbard 790720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 4 Storrs, Connecticut 900518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes stellaris 1 Ansätten, Jämtland 090704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes stellaris 2 Ansätten, Jämtland 090704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes stellaris 3 Riksgränsen, Torne Lappmark 830725 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes virginiensis Housatonic State Forest, Connecticut 900606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes 1a Bot Garden, Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes 1b Bot Garden, Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes 1c Bot Garden, Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes foliolosa 1 Jeknaffo, Lule Lappmark 870715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes foliolosa 2 Jeknaffo, Lule Lappmark 870715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 11 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 3 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 4 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 5 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 6 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 7 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieracifolia 8 Guolasjavri, Troms, Norway 220720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieraciifolia 1 Battfjellet, Svalbard 790720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes hieraciifolia 2 Battfjellet, Svalbard 790720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 1 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 10 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 2 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 3 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 4 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 8 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes nivalis 9 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 1 Storrs, Connecticut 900518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 10 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 2 Storrs, Connecticut 900518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 3 Storrs, Connecticut 900518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 5 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 6 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 7 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 8 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes pensylvanica 9 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 1 Kopparåsen, Torne Lappmark 110727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 2 Kopparåsen, Torne Lappmark 110727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 3 Kopparåsen, Torne Lappmark 110727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 4 Kopparåsen, Torne Lappmark 110727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 5 Riksgränsen, Torne Lappmark 880704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 6 Riksgränsen, Torne Lappmark 880704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Micranthes tenuis 7 SE of Låktatjåkka, Torne Lappmark 830726 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).