Sisymbrium altissimum 2 Lund Sk 120702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium altissimum 3 Lund Sk 120702 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium altissimum 4 Höllviken Sk 090621 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 1 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 10 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 11 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 12 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 4 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 5 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 6 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf erysimoides 3 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf erysimoides 4 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf loeselii 4 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf loeselii 5 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 5 Magaluf, Mallorca 110417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 7 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 8 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 1 Lynette Renseanlaeg, Copenhagen 131017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 3 Lynette Renseanlaeg, Copenhagen 131017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 5 near Copenhagen Airport DK 130810 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 6 Tallinn, Estonia 100708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 7 near Copenhagen Airport DK 130810 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

Sisymbrium luteum 8 Copenhagen Bot Garden 130604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium officinale 2 Lund, Sk 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium officinale 4 Lund, Sk 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium orientale 1 Malmö Central Station Sk 131001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium orientale 2 Malmö Central Station Sk 131001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium orientale 3 Malmö Central Station Sk 131001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium orientale 4 Malmö Central Station Sk 131001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium orientale 5 Malmö Central Station Sk 131001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium orientale 6 Malmö Central Station Sk 131001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium polyceratium 1 Dadia, Thracia, Greece 060608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium polymorphum 1 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium polymorphum 2 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium polymorphum 4 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Sisymbrium strictissimum 5 Lund Bot Garden 130627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium strictissimum 6 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium strictissimum 7 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium volgense 1 Tallinn, Estonia 100708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium volgense 3 Höllviken, Sk 100703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium volgense 4 Höllviken, Sk 100703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium volgense 5 Höllviken, Sk 100703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium volgense 6 Höllviken, Sk 100703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium altissimum 1 Lund Sk 130614 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 2 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 3 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 7 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 8 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium austriacum 9 Cote 2000 between Moucherolle and Moucherotte FR 150704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf erysimoides 1 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf erysimoides 2 Hoces del Rio Duratón near Sepúlveda SP 140505 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf loeselii 1 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf loeselii 2 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium cf loeselii 3 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 1 Lake King, Western Australia 111004 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 10 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 2 Sankt Eriksplan, Stockholm 940820 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 3 Magaluf, Mallorca 110417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 4 Magaluf, Mallorca 110417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 6 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium irio 9 Madrid SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 2 Lynette Renseanlaeg, Copenhagen 131017 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 4 near Copenhagen Airport DK 130810 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium loeselii 8 Tallinn, Estonia 100708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

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

Sisymbrium officinale 1 Lund, Sk 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium officinale 3 Lund, Sk 070811 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium officinale 5 Lund, Sk 120818 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium polyceratium 2 Dadia, Thracia, Greece 060608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Sisymbrium polymorphum 3 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

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

Sisymbrium volgense 2 Höllviken, Sk 100627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).