Achillea ageratifolia 10 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 11 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 12 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 5 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 6 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 7 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf clavenae 1 Stubnerkogel, Austria 080702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf clavenae 3 Stubnerkogel, Austria 080702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf coarctata 2 between Topolovgrad and Hljabovo, Bulgaria 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf coarctata 3 between Topolovgrad and Hljabovo, Bulgaria 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf coarctata 4 between Topolovgrad and Hljabovo, Bulgaria 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf setacea NW of Dadia, Thracia, Greece 060606 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf umbellata 1 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf umbellata 2 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf umbellata 3 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea chrysocoma 1 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea chrysocoma 2 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea chrysocoma 3 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea chrysocoma 4 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea chrysocoma 5 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea clusiana 1 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea clusiana 2 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea clusiana 4 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

Achillea collina 3 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea collina 4 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cretica 2 Menetes, Karpathos, Greece 040518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea crithmifolia 11 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea crithmifolia 12 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea crithmifolia 2 Dadia, Thracia, Greece 060604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

Achillea filipendulina 2 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Achillea maritima 1 Ag. Nikolaos, Karpathos, Greece 040521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea maritima 2 Ag. Nikolaos, Karpathos, Greece 040521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 2 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 3 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 4 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 5 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 6 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 7 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 8 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea millefolium 9 Lund Sk 120927 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Achillea nana 3 La Meije near Col du Lautaret FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea nana 4 La Meije near Col du Lautaret FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea nana 5 La Meije near Col du Lautaret FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp cartilaginea 2 Peipsi, Estonia 100709 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp cartilaginea 3 Klintaine piesupite, Latvia 060708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp cartilaginea 4 Klintaine piesupite, Latvia 060708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp ptarmica 1 Skanörs Ljung Sk 130622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp ptarmica 3 Skanörs Ljung Sk 130622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp ptarmica 4 Skanörs Ljung Sk 130622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Achillea tomentosa 1 Horsabäck Garden, Våxtorp, Halland 130617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea tomentosa 2 Horsabäck Garden, Våxtorp, Halland 130617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea tomentosa 3 Horsabäck Garden, Våxtorp, Halland 130617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea tomentosa 4 Horsabäck Garden, Våxtorp, Halland 130617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 1 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 2 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 3 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ageratifolia 4 Lund Bot Garden 160520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Achillea cf clavenae 2 Stubnerkogel, Austria 080702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cf coarctata 1 between Topolovgrad and Hljabovo, Bulgaria 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea clusiana 3 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea clusiana 5 Mt Voras (Kajmakcalan), N Greece 180701 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Achillea coarctata 1 near Lake Mikri Prespa, N Greece 180628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea coarctata 2 near Lake Mikri Prespa, N Greece 180628 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea cretica 1 Menetes, Karpathos, Greece 040518 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea crithmifolia 1 Dadia, Thracia, Greece 060604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea crithmifolia 10 Mt Falakron, N Greece 180703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

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

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

Achillea millefolium 1 Lund Sk 121001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea nana 2 La Meije near Col du Lautaret FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea nana 6 La Meije near Col du Lautaret FR 150708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp cartilaginea 1 Klintaine piesupite, Latvia 060708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp cartilaginea and Senecio paludosus Klintaine piesupite, Latvia 060708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achillea ptarmica ssp ptarmica 2 Skanörs Ljung Sk 130622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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