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

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

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

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

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

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

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

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

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

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

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

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

Epimedium perralderianum 1 Lund Sk 080505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium perralderianum 2 Lund Sk 080505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium perralderianum 4 Lund Sk 080505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium perralderianum 6 Lund Sk 080505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 1 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 2 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 3 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 4 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pubigerum 13 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pubigerum 14 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

Epimedium pubigerum 8 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pubigerum 9 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Epimedium cf grandiflorum 1 (cult) Brunnby Sk 110521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium cf grandiflorum 2 (cult) Brunnby Sk 110521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium perralderianum 3 Lund Sk 080505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium perralderianum 5 Lund Sk 080505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 1 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 2 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 3 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pinnatum ssp colchicum 4 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Epimedium pubigerum 10 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pubigerum 11 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Epimedium pubigerum 12 Copenhagen Bot Garden 140424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

Epimedium sempervirens New York Bot Garden 900505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).