Rorippa amphibia 1 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 8 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 9 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia Håslövs Ängar, Skåne 790622 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia, Oenanthe aquatica W of Knäbäckshusen, Rörum, Skåne 820618 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 13 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 2 Pålsjö, Helsingborg, Skåne 810625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 3 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 4 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 5 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 6 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 7 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 8 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 9 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 1 Lille Saltsö, Kangerlussuaq, Greenland 140704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 10 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 11 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 12 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 13 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 14 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 15 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 2 Lille Saltsö, Kangerlussuaq, Greenland 140704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 3 Lille Saltsö, Kangerlussuaq, Greenland 140704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 4 Lille Saltsö, Kangerlussuaq, Greenland 140704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 5 Lille Saltsö, Kangerlussuaq, Greenland 140704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 6 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 7 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 8 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica 9 Lake Helen, Kangerlussuaq, Greenland 140703 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa islandica Vindbelgjarfjall, Iceland 770711 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 4 Lund Sk 121001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 5 Lund Sk 120818 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 6 Lund Sk 121001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa pyrenaica 1 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa pyrenaica 2 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa sylvestris 1 Lund Bot Garden 130610 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa sylvestris 2 Lund Bot Garden 130610 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa sylvestris 3 Lund Bot Garden 130610 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa sylvestris 4 Lund Bot Garden 130610 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 11 Partheno Dasos, Rhodopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 4 near Poroi village, Bu 120506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 5 near Poroi village, Bu 120506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 10 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 11 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 2 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 3 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 4 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 5 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 6 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa amphibia 7 Lund Sk 140525 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 1 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 1 Pålsjö, Helsingborg, Skåne 810625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 10 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 11 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 12 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa austriaca 2 Krematoriet, Helsingborg Sk 140604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa elata near Lijiang, Yunnan 110707 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 1 E of Lund Sk 130607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 2 Lund Sk 120818 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 3 Lund Sk 120818 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa palustris 7 Lund Sk 121001 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa pyrenaica 3 above Metsovon, Greece 180627 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 1 near Poroi village, Bu 120506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 10 Partheno Dasos, Rhodopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 12 Partheno Dasos, Rhodopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 2 near Poroi village, Bu 120506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 3 near Poroi village, Bu 120506 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 6 Bulgarska Polyana, Bu 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 7 Partheno Dasos, Rhodopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 8 Partheno Dasos, Rhodopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Rorippa thracica 9 Partheno Dasos, Rhodopi Mountains, N Greece 180704 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).