Spiraea 1a (cult) Lund Sk 080523 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1a (cult) Lund Sk 160530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1b (cult) Lund Sk 080523 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1b (cult) Lund Sk 160530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1c (cult) Lund Sk 160530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1d (cult) Lund Sk 160530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1e (cult) Lund Sk 160530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea 1f (cult) Lund Sk 160530 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea albiflora 1 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea albiflora 2 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea albiflora 3 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea albiflora 4 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea bella 1 near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea bella 2 near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea chamaedryfolia 1 Garda de Sus, Romania 090615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea chamaedryfolia 2 Garda de Sus, Romania 090615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea chamaedryfolia 3 Garda de Sus, Romania 090615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea chamaedryfolia 4 Garda de Sus, Romania 090615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea chamaedryfolia 5 Garda de Sus, Romania 090615 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea decumbens 1 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Spiraea decumbens 4 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 10 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 7 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 8 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 9 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea hypericifolia 2 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea hypericifolia 3 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea hypericifolia 4 Vashlovani Nat. Park, Georgia 170424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea hypericifolia 5 Vashlovani Nat. Park, Georgia 170424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea margaritae 1 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea margaritae 2 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea margaritae 3 Lund Bot Garden 150731 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 1 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 2 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 3 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 4 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 5 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 7 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea media 8 above Pécs, Mecsek, Hungary 240508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea ulmifolia Turda, Romania 090614 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x macrothyrsa 3 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x macrothyrsa 4 Örkelljunga, Skåne 950819 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x macrothyrsa 5 Örkelljunga, Skåne 950819 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rosalba 4 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rosalba 5 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rosalba 6 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rubella Glimåkra, Skåne 960712 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x vanhouttei 1 (cult) Lund Sk 160524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x vanhouttei 2 (cult) Lund Sk 160524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x vanhouttei 3 (cult) Lund Sk 160524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 1 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 10 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 11 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 12 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 13 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 14 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 15 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 16 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 17 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 18 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 19 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 2 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 20 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 3 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 4 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 5 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 6 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 7 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 8 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea alba var latifolia 9 Hästveda Sk 150716 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea bella 3 near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 1 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 2 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 3 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 4 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 5 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea douglasii 6 Nättraby station, Bleking 110814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea hypericifolia 1 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea salicifolia 1 (cult) Stångby Sk 200617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea salicifolia 2 (cult) Stångby Sk 200617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea salicifolia 3 (cult) Stångby Sk 200617 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea tomentosa 1 Hästveda, Skåne 950819 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea tomentosa 2 Hästveda, Skåne 950819 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x billardii 1 (cult) Stångby, Skåne 040802 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x billardii 2 Munka-Ljungby, Skåne 990710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x macrothyrsa 1 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x macrothyrsa 2 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rosalba 1 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rosalba 2 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x rosalba 3 Radansuu FI 120729 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x vanhouttei 4 (cult) Lund Sk 160524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Spiraea x vanhouttei 5 (cult) Lund Sk 160524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).