Potentilla 1 Yunnan 1107 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla 3b Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla 3c Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla 3d Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla 3e Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 10 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 11 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 15 Lund Bot Garden 150612 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 2 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 3 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 4 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 5 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 6 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 7 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 8 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Potentilla alchemilloides 10 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Potentilla alchemilloides 3 Copenhagen Bot Garden 080710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Potentilla alchemilloides 7 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alchemilloides 8 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alchemilloides 9 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla ambigua 2 Bergianska 060620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 1 Bergianska, Stockholm 050621 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 10 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 2 Bergianska, Stockholm 050621 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 3 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 4 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 5 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 6 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 7 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 9 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 1 Kangerlussuaq, Greenland 140704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 10 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 11 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 12 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 5 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 6 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 7 Store Saltsö, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 9 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 1 Höllviken Sk 120717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 2 Höllviken Sk 120717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 3 Höllviken Sk 120717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 4 Höllviken Sk 120718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 5 Höllviken Sk 120718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 6 Höllviken Sk 120718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla argentea 7 Höllviken Sk 120718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla astrachanica 1 near Lake Mikri Prespa, N Greece 180629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla astrachanica 2 near Lake Mikri Prespa, N Greece 180629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla astrachanica 5 near Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 1 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 2 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 3 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 4 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 5 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 6 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea 7 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla atrosanguinea Bergianska 060620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea 3 Nassfeld, Austria 080701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea 4 Nassfeld, Austria 080701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea 5 Chamrousse FR 150703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea 6 Chamrousse FR 150703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea ssp chrysocraspeda 2 Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea ssp chrysocraspeda 3 Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea ssp chrysocraspeda 4 Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea ssp chrysocraspeda 5 Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea ssp chrysocraspeda 7 Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla brauniana 1 between Col du Lautaret and Col du Galibier FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla brauniana 2 between Col du Lautaret and Col du Galibier FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla buccana 1 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla buccana 2 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla buccana 3 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla buccana 4 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla buccana 5 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla buccana 6 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf canadensis 1 Storrs, Connecticut 900425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf canadensis 2 Storrs, Connecticut 900425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf crantzii 1 Österplana, Västergötland 140529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf crantzii 2 Österplana, Västergötland 140529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf crantzii 3 Österplana, Västergötland 140529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf crantzii 5 Österplana, Västergötland 140529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf eriocarpa 1 (cult) Brunnby Sk 130615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf eriocarpa 2 (cult) Brunnby Sk 130615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf intermedia Skälderviken, Skåne 960927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf leucopolitana 1 Copenhagen Bot Garden 121017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf leucopolitana 2 Copenhagen Bot Garden 121017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf leucopolitana 3 Copenhagen Bot Garden 121017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf leucopolitana 4 Copenhagen Bot Garden 121017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf patula 1 near Kazbegi, Georgia 170419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf patula 2 near Kazbegi, Georgia 170419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf patula 3 near Kazbegi, Georgia 170419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf patula 4 near Kazbegi, Georgia 170419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf patula 5 near Lake Kartsakhi, Georgia 170426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf patula 6 near Lake Kartsakhi, Georgia 170426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 11 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 12 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 13 Kvinnsgröta, Gräsgård, Öland 150606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 14 Kvinnsgröta, Gräsgård, Öland 150606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 15 Kvinnsgröta, Gräsgård, Öland 150606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 16 Kvinnsgröta, Gräsgård, Öland 150606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 17 Kvinnsgröta, Gräsgård, Öland 150606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 4 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 5 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 6 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 7 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 8 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 9 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla detommasii 2 Devas near Lake Mikri Prespa, N Greece 180629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla detommasii 3 Devas near Lake Mikri Prespa, N Greece 180629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 1 Skanörs Ljung Sk 130608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 10 E of Lund Sk 130607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 11 Stenungsund, Bohuslän 120701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 12 Stenungsund, Bohuslän 120701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 2 Skanörs Ljung Sk 130608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 3 Mölle, Brunnby Sk 110521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 4 Mölle, Brunnby Sk 110521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 5 Skanörs Ljung Sk 130608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 8 E of Lund Sk 130607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 9 E of Lund Sk 130607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla eriocarpa 1 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla eriocarpa 2 Copenhagen Bot Garden 121017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla eriocarpa 3 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis 2 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis 3 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis var nuttallii 3 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis var nuttallii 4 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis var nuttallii 5 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla grandiflora 1 Chamrousse FR 150703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla grandiflora 2 Chamrousse FR 150703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla grandiflora 3 Chamrousse FR 150703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 1 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 10 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 11 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 12 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 15 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 16 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 2 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 3 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 4 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 5 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 6 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 7 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 8 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 9 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 1 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 12 Merkine, Lithuania 100714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 13 near Merkine, Lithuania 150806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 14 near Merkine, Lithuania 150806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 15 near Merkine, Lithuania 150806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 16 near Merkine, Lithuania 150806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 17 near Merkine, Lithuania 150806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 18 near Merkine, Lithuania 150806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 2 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 3 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 4 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 5 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 7 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 8 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 9 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 10 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 11 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 3 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 4 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 5 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 6 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 7 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 8 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 9 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 1 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 2 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 3 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 4 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 5 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 6 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 7 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla indica 8 Rancho Santa Ana Botanic Garden, CA 130406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 5 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 6 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 7 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Potentilla leschenaultiana 3 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leschenaultiana 4 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leschenaultiana 5 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 3 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 1 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 10 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 2 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 3 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 4 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 5 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 6 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 7 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 8 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla megalantha 9 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 1 Lund Bot Garden 130503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 10 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 11 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 12 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 13 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 2 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 3 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 4 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 5 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 6 Lund Bot Garden 130503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 7 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 8 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 9 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 1 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 2 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 3 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 6 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 7 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 8 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 9 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla multifida 3 Abisko Östra, Torne Lappmark 910713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla multifida 4 Abisko Östra, Torne Lappmark 910713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla multifida 5 Abisko Östra, Torne Lappmark 910713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla multifida 6 Abisko Östra, Torne Lappmark 110724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

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

Potentilla nevadensis 1 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nevadensis 2 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nevadensis 3 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nevadensis 4 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 1 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 11 Unna Titer, Lule Lappmark 870714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 2 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 5 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 6 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 7 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 8 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 9 Unna Titer, Lule Lappmark 870714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 10 Dzukija, Lithuania 100714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 11 Dzukija, Lithuania 100714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 12 Dzukija, Lithuania 100714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 4 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 5 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 6 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 7 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 9 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla pulchella 1 Longyearbyen, Svalbard 790703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla pulchella 2 Longyearbyen, Svalbard 790703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla purpurea 1 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla purpurea 3 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla purpurea 4 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 11 Sachsska Sjukhuset, Stockholm 880628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 4 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 5 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 6 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 7 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 8 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 1 Fjälkinge Sk 080609 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 10 Lund Sk 120722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 11 Lund Sk 120722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 2 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 3 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 4 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 5 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 6 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 7 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 8 Lund Sk 120722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 9 Lund Sk 120722 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla robbinsiana 1 Battfjellet, Svalbard 790719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla robbinsiana 2 Battfjellet, Svalbard 790719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla robbinsiana 4 Jeknaffo, Lule Lappmark 870715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla saundersiana 3 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 1 Stenshuvud, Södra Mellby Sk 080602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 2 Stenshuvud, Södra Mellby Sk 080602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 3 Stenshuvud, Södra Mellby Sk 080602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 4 Stenshuvud, Södra Mellby Sk 080602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 5 Stenshuvud, Södra Mellby Sk 150502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 7 Stenshuvud, Södra Mellby Sk 150502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 8 Stenshuvud, Södra Mellby Sk 150502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 9 Stenshuvud, Södra Mellby Sk 150502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 1 Copenhagen Bot Garden 080513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 1 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 10 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 11 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 12 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 13 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 14 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 15 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 16 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 17 Ottenby gravfält, Ås, Öland 150604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 18 Karlskrona, Blekinge 160601 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 19 Karlskrona, Blekinge 160601 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 2 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 20 Karlskrona, Blekinge 160601 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 21 Karlskrona, Blekinge 160601 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 3 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 4 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 5 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 6 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 7 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 9 W of Albrunna Lund, Södra Möckleby, Öland 940628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla subarenaria 1 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla subarenaria 2 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla subarenaria 3 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla subarenaria 4 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla subarenaria 5 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla subarenaria 6 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 1 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 11 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 12 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 14 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 15 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 16 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 17 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 2 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 3 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 4 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 5 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 5 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 6 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 7 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 8 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla thuringiaca 1 Runmarö, Uppland 980625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla thuringiaca 2 Runmarö, Uppland 980625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla thuringiaca Runmarö, Uppland 880731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 1 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 2 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 3 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 4 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 5 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 6 Göteborg Bot Garden 130524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 7 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 8 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tommasiniana 9 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 1 Ardre, Gotland 110506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 2 Ardre, Gotland 110506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 3 Ardre, Gotland 110506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 4 Ardre, Gotland 110506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 5 Ardre, Gotland 110506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 6 Höllviken Sk 080503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 7 Höllviken Sk 080503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 8 Höllviken Sk 080503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla verna 9 Höllviken Sk 080503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla 3a Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 1 Copenhagen Bot Garden 080513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 12 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 13 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 14 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alba 9 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alchemilloides 5 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla alchemilloides 6 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla ambigua 1 Bergianska 060620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla anglica 8 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 2 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 3 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 4 Mt Hassel, Kangerlussuaq, Greenland 140630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla arenosa ssp chamissonis 8 Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla astrachanica 3 near Lake Mikri Prespa, N Greece 180629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla astrachanica 4 near Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea 1 Nassfeld, Austria 080701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea 2 Nassfeld, Austria 080701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla aurea ssp chrysocraspeda 1 Mt Varnous, N Greece 180630 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf crantzii 4 Österplana, Västergötland 140529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf crantzii 6 Österplana, Västergötland 140529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf polyphylla 1 near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf polyphylla 2 near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla cf polyphylla 3 near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 1 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 10 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 2 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla crantzii 3 Nolgården, Näs, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla detommasii 1 Devas near Lake Mikri Prespa, N Greece 180629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 6 E of Lund Sk 130607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla erecta 7 E of Lund Sk 130607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis 1 Copenhagen Bot Garden 160713 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis var nuttallii 1 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla gracilis var nuttallii 2 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 13 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla heptaphylla 14 Västra Karaby Sk 140426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 10 Merkine, Lithuania 100714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla incana 6 Tofta, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 1 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla inclinata 2 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 1 Kenkävero FI 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 2 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 3 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 4 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla intermedia 8 Kenkävero Fi 120801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 1 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 2 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 4 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 5 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 6 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 7 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 8 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla leucopolitana 9 Hammershus, Bornholm DK 120602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micrantha 14 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla micropetala 5 Napa Hai, Yunnan 110709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla multifida 1 Abisko Östra, Torne Lappmark 110724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla multifida 2 Abisko Östra, Torne Lappmark 110724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 10 Unna Titer, Lule Lappmark 870714 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 3 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla nivea 4 Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 1 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 2 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 3 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla norvegica 8 Kvarnbäcken, E of Helsinki Fi 120728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla purpurea 2 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 1 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 10 Sachsska Sjukhuset, Stockholm 880628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 2 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 3 Bulgarska Polyana, Dzukija, Lithuania 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla recta 9 Sachsska Sjukhuset, Stockholm 880628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla reptans 12 Lund Sk 120704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla robbinsiana 3 Jeknaffo, Lule Lappmark 870715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla saundersiana 1 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla saundersiana 2 Baimashan, Yunnan 110710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterilis 6 Stenshuvud, Södra Mellby Sk 150502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla sterneri 8 Copenhagen Bot Garden 080513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 10 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 13 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 6 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 7 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 8 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla supina 9 Vilnius, Lithuania 150805 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 1 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 2 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 3 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Potentilla tergemina 4 Keminmaa, Kemi, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).