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

Cornus alba 2 (cult) Lund Sk 080523 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus alba 3 (cult) Lund Sk 121020 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus alba 4 (cult) Lund Sk 121020 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus alternifolia 2 Storrs, Connecticut 900605 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

Cornus baileyi 2 Lund Bot Garden 070524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus californica 1 (cult) La Brea Tar Pits, Los Angeles, CA 130429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus californica 2 (cult) La Brea Tar Pits, Los Angeles, CA 130429 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Cornus canadensis 4 Bergianska, Stockholm 010831 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus canadensis 5 Bergianska, Stockholm 010831 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus canadensis 6 Bergianska, Stockholm 050815 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus cf obliqua Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

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

Cornus florida 1 Storrs, Connecticut 900515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus florida 2 New York Bot Garden 900505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus florida 3 Storrs, Connecticut 900515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Cornus kousa 10 Lund Bot Garden 121006 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 11 Lund Bot Garden 121006 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Cornus kousa 3 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 4 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 5 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 6 Lund Bot Garden 130627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 7 Lund Bot Garden 130627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 8 Lund Bot Garden 130627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus kousa 9 Lund Bot Garden 121006 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus mas 1 (cult) Lund Sk 120417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus mas 2 (cult) Lund Sk 120417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus mas 3 (cult) Lund Sk 120417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus mas 4 (cult) Lund Sk 120417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus mas 5 (cult) Lund Sk 120417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus mas 6 (cult) Lund Sk 120417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus nuttallii 1 Lund Bot Garden 080508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus nuttallii 2 Lund Bot Garden 080508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus rugosa Lund Bot Garden 100629 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 2 E of Lund Sk 130614 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 3 E of Lund Sk 130614 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 4 W of Lenstad, Öland 080614 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 5 (cult) Lund Sk 121001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 6 (cult) Lund Sk 130902 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 7 (cult) Lund Sk 121001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea 8 (cult) Lund Sk 130902 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea ssp cilicica 1 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea ssp cilicica 2 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus sanguinea ssp cilicica 3 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Cornus sericea 3 Bergianska, Stockholm 050815 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus suecica 1 Lund Bot Garden 130528 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus suecica 2 Lund Bot Garden 130528 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus suecica 3 Lund Bot Garden 130528 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus suecica 4 Njulla, Torne Lappmark 910712 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus alternifolia 1 Storrs, Connecticut 900605 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cornus baileyi 1 Lund Bot Garden 070524 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

Cornus sanguinea 1 E of Lund Sk 130614 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).