Salix 1d Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 1e Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 2a Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 2b Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 2c Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 2d Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba 2 Mörby, Danderyd, Uppland 050816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba 3 Kummeln, Lyckeby, Blekinge 160602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba 4 Kummeln, Lyckeby, Blekinge 160602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba 5 Kummeln, Lyckeby, Blekinge 160602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba 6 Kummeln, Lyckeby, Blekinge 160602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba 7 Kummeln, Lyckeby, Blekinge 160602 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba x fragilis 1 Lappkärret, Stockholm 060524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba x fragilis 2 Lappkärret, Stockholm 060524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alba x fragilis Höllviken, Skåne 050717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix alpina Bergianska 060830 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix arbuscula 1 between Abisko and Björkliden, Torne Lappmark 880703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix arbuscula 2 between Abisko and Björkliden, Torne Lappmark 880703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix arbuscula 4 between Villar d'Arène and Col du Lautaret FR 150707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix arctica Kangerlussuaq, Greenland 140712 - Photo: (© 2014 Jan Thomas Johansson).

Salix arctophila 1 Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix arctophila 3 Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 2 Tjursjön, Sandemar, Södermanland 040528 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 3 Åraslöv, Vinslöv Sk 180606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 4 Åraslöv, Vinslöv Sk 180606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 5 Åraslöv, Vinslöv Sk 180606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 6 Örkened Sk 190607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 7 Örkened Sk 190607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 8 Örkened Sk 190607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita Sandemar, Södermanland 020802 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis 1 Barr. del Infierno, Tenerife 160406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis 2 Barr. del Infierno, Tenerife 160406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis 3 Barr. del Infierno, Tenerife 160406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis 4 Barr. del Infierno, Tenerife 160406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis 5 Barr. del Infierno, Tenerife 160406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis 6 Barr. del Infierno, Tenerife 160406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 1 Lund Sk 140323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 3 Fågelsång, Södra Sandby Sk 140323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 5 Fågelsång, Södra Sandby Sk 140323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf fargesii 1 Flinck's Garden, Bjuv Sk 070521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf kitaibeliana Malá studená dolina, Slovakia 950628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf triandra 1 Lund Sk 110425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 10 Klagshamn Sk 170508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 11 Klagshamn Sk 170508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 12 Lund Sk 170408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 13 Lund Sk 170408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 15 Klagshamn Sk 170508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 2 Höllviken Sk 120623 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 3 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 4 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 5 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 6 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 7 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 8 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 9 Ivö Sk 170514 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp acutifolia 2 dunes near Peipsi, Estonia 100709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp daphnoides 5 Papes Nature Park, Latvia 100715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp daphnoides 6 Kakella-Grimsa, Norway 820801 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix dasyclados 3 between Slutiski and Verveli near Daugava, Latvia 100711 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 1 Col de la Croix Perrin FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 2 Col de la Croix Perrin FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 3 Col de la Croix Perrin FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 5 Limhamn Sk 170517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 6 Limhamn Sk 170517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 7 Limhamn Sk 170517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix foetida 1 between Villar d'Arène and Col du Lautaret FR 150707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix foetida 2 between Villar d'Arène and Col du Lautaret FR 150707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix fumosa Bergianska 060830 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1a Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1b Store Saltsö, Kangerlussuaq, Greenland 140701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1c Store Saltsö, Kangerlussuaq, Greenland 140701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1d Store Saltsö, Kangerlussuaq, Greenland 140701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1f Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1g Kangerlussuaq, Greenland 140628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1h N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp subintegrifolia 1 Storfossen, Tana, Finnmark, Norway 220727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp subintegrifolia 2 Storfossen, Tana, Finnmark, Norway 220727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp subintegrifolia 3 Storfossen, Tana, Finnmark, Norway 220727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp subintegrifolia 4 Storfossen, Tana, Finnmark, Norway 220727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp subintegrifolia 5 Storfossen, Tana, Finnmark, Norway 220727 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 1 Vandplasken, Jylland DK 060806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 13 Dagstorp Sk 190808 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 14 Dagstorp Sk 190808 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 15 Dagstorp Sk 190808 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 16 Dagstorp Sk 190808 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 20 Dagstorps mosse 200809 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 12 Mossarp, Södervidinge Sk 160827 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 8 Skogatorpskärren, Högstena, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 9 Skogatorpskärren, Högstena, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 1 Katterjåkk, Torne Lappmark 910715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 2 Katterjåkk, Torne Lappmark 910715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 3 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 4 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 5 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 6 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 7 N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix humboldtiana 1 Rio Clarillo Nat Park, Chile 171104 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix humboldtiana 2 Rio Clarillo Nat Park, Chile 171104 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix laevigata 1 Wind Wolves Preserve, CA 130412 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp lanata 1 Riksgränsen, Torne Lappmark 880704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp lanata 3 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp lanata 4 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp lanata 5 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lapponum 6 Tjietnjalisjaure, Torne Lappmark 110728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lapponum 7 E of Myrland, Neidenfjorden, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lapponum 8 E of Myrland, Neidenfjorden, Finnmark, Norway 220724 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 10 Limhamn Sk 200429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 11 Limhamn Sk 200429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 13 Limhamn Sk 200429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 2 Kungsmarken, Södra Sandby Sk 140516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 3 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 7 Limhamn Sk 170517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 8 Limhamn Sk 200429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix myrsinites 6 Jupukka, Pajala, Norrbotten 220717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrtilloides 1 Rautas, Torne Lappmark 830728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrtilloides 2 Rautas, Torne Lappmark 830728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix nepalensis 1 Lund Bot Garden 130610 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix nepalensis 2 Lund Bot Garden 130610 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 1 Täby, Uppland 060527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 10 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 11 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 12 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 3 Täby, Uppland 060527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 4 Täby, Uppland 060527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 5 Täby, Uppland 060527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 6 Täby, Uppland 060527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 7 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 8 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 9 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix polaris 1 Tverrdalen-Reindalen, Svalbard 790718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix polaris 2 Tverrdalen-Reindalen, Svalbard 790719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix polaris 3 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix purpurea 1 Col de la Croix Perrin FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix purpurea 2 Col de la Croix Perrin FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix purpurea 3 Col de la Croix Perrin FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 12 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 3 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 4 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 5 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 6 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 7 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 8 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 9 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 1 Skanörs Ljung Sk 140412 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 2 Skanörs Ljung Sk 140412 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 3 Skanörs Ljung Sk 140412 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 4 Skanörs Ljung Sk 140622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 5 Skanörs Ljung Sk 140622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 1 Höllviken Sk 080502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 10 Höllviken 110820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 11 Höllviken 110820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 12 Höllviken 110820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 15 Dagstorp Sk 200809 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 16 Dagstorp Sk 200809 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 4 Höllviken, Sk 130518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 6 Höllviken Sk 080502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 7 Höllviken Sk 130518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 8 Höllviken Sk 130518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 9 Höllviken Sk 130608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp rosmarinifolia 1 Viidumäe, Saaremaa, Estonia 050719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix reticulata 4 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix reticulata 5 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Salix silesiaca Malá studená dolina, Slovakia 950628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix triandra 1 Prästberget E of Hammarforsen, Jämtland 090702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix triandra 2 Prästberget E of Hammarforsen, Jämtland 090702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix triandra 4 Prästberget E of Hammarforsen, Jämtland 090702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 1 Lund Sk 140402 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 10 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 14 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 2 Lund Sk 140402 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 3 Lund Sk 140402 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 4 Lund Sk 140402 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 5 E of Lund Sk 130618 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 6 E of Lund Sk 130618 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 7 Lund Sk 130919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 8 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 9 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 2 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 3 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 4 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 6 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 7 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 8 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 1a Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 1b Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix 1c Santa Margarita River, CA 130415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix alba 1 Mörby, Danderyd, Uppland 050816 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix arbuscula 3 between Villar d'Arène and Col du Lautaret FR 150707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix arctophila 2 Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix arctophila 4 Tacan, Kangerlussuaq, Greenland 140629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix aurita 1 Tjursjön, Sandemar, Södermanland 040528 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix canariensis Masca, Tenerife 940310 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 2 Lund Sk 140323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 4 Fågelsång, Södra Sandby Sk 140323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 6 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 7 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix caprea 8 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf fargesii 2 Flinck's Garden, Bjuv Sk 070521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf fargesii 3 Flinck's Garden, Bjuv Sk 070521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf fargesii 4 Flinck's Garden, Bjuv Sk 070521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf triandra 2 Lund Sk 110425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf triandra 3 Lund Sk 110425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf triandra 4 Lund Sk 110425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf triandra 5 Lund Sk 110425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cf triandra 6 Lund Sk 110425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 1 Höllviken Sk 120623 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix cinerea 14 Klagshamn Sk 170508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp acutifolia 1 dunes near Peipsi, Estonia 100709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp acutifolia 3 dunes near Peipsi, Estonia 100709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp daphnoides 1 Papes Nature Park, Latvia 100715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp daphnoides 2 Papes Nature Park, Latvia 100715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp daphnoides 3 Papes Nature Park, Latvia 100715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix daphnoides ssp daphnoides 4 Papes Nature Park, Latvia 100715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix dasyclados 1 between Slutiski and Verveli near Daugava, Latvia 100711 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix dasyclados 2 between Slutiski and Verveli near Daugava, Latvia 100711 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix elaeagnos 4 Limhamn Sk 170517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix fragilis Vaxmora, Sollentuna, Uppland 040511 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1e N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix glauca ssp callicarpaea 1i N of Russel Glacier, E of Kangerlussuaq, Greenland 140702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata 1 Nörlev Strand, Jylland DK 160613 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata 2 Nörlev Strand, Jylland DK 160613 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata 3 Nörlev Strand, Jylland DK 160613 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata 4 Nörlev Strand, Jylland DK 160613 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 17 Dagstorp Sk 200426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 18 Dagstorp Sk 200426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 19 Dagstorp Sk 200426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 2 Vandplasken, Jylland DK 060806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 21 Allarp, Södervidinge 210428 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 22 Allarp, Södervidinge 210428 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 23 Allarp, Södervidinge 210428 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 24 Allarp, Södervidinge 210428 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata ssp vegeta 3 Vandplasken, Jylland DK 060806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 10 Mossarp, Södervidinge Sk 160827 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 11 Mossarp, Södervidinge Sk 160827 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 4 Skogatorpskärren, Högstena, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 5 Skogatorpskärren, Högstena, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 6 Skogatorpskärren, Högstena, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix hastata var vegeta 7 Skogatorpskärren, Högstena, Västergötland 140530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix herbacea 9 Cerastium cerastoides Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix laevigata 2 Wind Wolves Preserve, CA 130412 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp glandulifera Bergianska, Stockholm 020430 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp glandulifera Björkliden, Torne Lappmark 880703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp lanata 2 Riksgränsen, Torne Lappmark 910715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lanata ssp lanata 6 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Salix lapponum 3 Tjietnjalisjaure, Torne Lappmark 110728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lapponum 4 Tjietnjalisjaure, Torne Lappmark 110728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix lapponum 5 Tjietnjalisjaure, Torne Lappmark 110728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 1 Kungsmarken, Södra Sandby Sk 140516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 12 Limhamn Sk 200429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 4 Stenshuvud, Södra Mellby Sk 140520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 5 Limhamn Sk 080919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 6 Limhamn Sk 080919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinifolia ssp myrsinifolia 9 Limhamn Sk 200429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinites 1 Jeknaffo, Lule Lappmark 870716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Salix myrsinites 4 Jupukka, Pajala, Norrbotten 220717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix myrsinites 5 Jupukka, Pajala, Norrbotten 220717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pentandra 2 Täby, Uppland 060527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix phylicifolia 1 Örån, Jämtland 090703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix phylicifolia 2 Örån, Jämtland 090703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix phylicifolia 3 Örån, Jämtland 090703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix phylicifolia 4 Örån, Jämtland 090703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix purpurea Zdiar, Slovakia 950629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 1 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 10 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 11 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix pyrolifolia 2 Suolijoki, Lappland, Finland 220728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 6 Gorsan, Valstad, Västergötland 140725 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 7 Gorsan, Valstad, Västergötland 140725 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens 8 Gorsan, Valstad, Västergötland 140725 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 13 Dagstorp Sk 200809 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 14 Dagstorp Sk 200809 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 2 Höllviken Sk 080502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 3 Höllviken Sk 080502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp repens var argentea 5 Höllviken Sk 080502 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp rosmarinifolia 2 Viidumäe, Saaremaa, Estonia 050719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp rosmarinifolia 3 Laukagalis SW of Labanoras, Lithuania 150804 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp rosmarinifolia 4 Laukagalis SW of Labanoras, Lithuania 150804 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix repens ssp rosmarinifolia 5 Laukagalis SW of Labanoras, Lithuania 150804 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix reticulata 1 Stubnerkogel, Austria 080702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix reticulata 2 Stubnerkogel, Austria 080702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix reticulata 6 Fløyfjell near Tromsø, Norway 220719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix starkeana 1 Lasila, Estonia 100708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix starkeana 2 Lasila, Estonia 100708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix starkeana 3 Lasila, Estonia 100708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix triandra 3 Prästberget E of Hammarforsen, Jämtland 090702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 11 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 12 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 13 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 15 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix viminalis 16 Lund Sk 150415 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 1 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Salix x sepulcralis 5 (cult) Lund Sk 150817 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).