Helleborus 1b Lund Bot Garden 090320 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus 1c Lund Bot Garden 090320 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus bocconei ssp bocconei 1 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus bocconei ssp bocconei 3 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus bocconei ssp bocconei 4 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus cyclophyllus 1 Bergianska, Stockholm 050513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus cyclophyllus 2 N of Polygyros, Greece 050526 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp balearicus 1 Jardín Botanico, Soller, Mallorca 110419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp balearicus 2 Jardín Botanico, Soller, Mallorca 110419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp balearicus 3 Jardín Botanico, Soller, Mallorca 110419 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 1 El Torcal de Antequera, Andulusia SP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 10 Lund Sk 140308 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 11 Lund Sk 140308 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 12 Lund Sk 140308 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 13 Lund Sk 140308 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 3 El Torcal de Antequera, Andulusia SP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 8 Lund Sk 140308 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 9 Lund Sk 140308 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 2 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 3 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 5 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 6 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 7 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 8 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus niger 1 (cult) Lund Sk 121119 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus niger 2 (cult) Lund Sk 121119 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus niger 3 (cult) Lund Sk 121119 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus niger 4 (cult) Lund Sk 121119 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 1 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 10 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 11 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 2 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 5 Lund Bot Garden 140311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 6 Lund Bot Garden 140311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 7 Lund Bot Garden 140311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 8 Lund Bot Garden 140311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 9 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 2 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 3 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 5 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 6 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 7 Lund Bot Garden 080422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 8 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 9 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp orientalis 4 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis (cult) Brunnby Sk 090322 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis ssp viridis 1 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis ssp viridis 2 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis ssp viridis 3 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis ssp viridis 4 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis ssp viridis 5 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus viridis ssp viridis 6 Copenhagen Bot Garden 140312 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus 1a Lund Bot Garden 090320 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus bocconei ssp bocconei 2 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus bocconei ssp bocconei 5 Copenhagen Bot Garden 160504 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 2 El Torcal de Antequera, Andulusia SP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 4 El Torcal de ,Antequera Andulusia SP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 5 El Torcal de Antequera Andulusia SpP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 6 El Torcal de Antequera, Andulusia SP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus foetidus ssp foetidus 7 El Torcal de Antequera, Andulusia SP 120323 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 1 Copenhagen Bot Garden 130516 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 10 Copenhagen Bot Garden 160504 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 11 Copenhagen Bot Garden 160504 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 12 Copenhagen Bot Garden 160504 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 4 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp corsicus 9 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp lividus 1 (cult) Höllviken Sk 080321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp lividus 2 (cult) Höllviken Sk 080321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp lividus 3 (cult) Höllviken Sk 080321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp lividus 4 (cult) Höllviken Sk 080321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp lividus 5 (cult) Höllviken Sk 080321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus lividus ssp lividus 6 (cult) Höllviken Sk 080321 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus niger 5 (cult) Lund Sk 121119 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 3 Lund Bot Garden 140311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis 4 Lund Bot Garden 140311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 1 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp abchasicus 4 DBV's Garden, Visby, Gotland 110508 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp orientalis 1 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp orientalis 2 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus orientalis ssp orientalis 3 Copenhagen Bot Garden 150421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Helleborus purpurascens northwestern Romania 090616 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).