Convolvulus 1a (cult) E Walpole, Western Australia 110930 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 1b (cult) E Walpole, Western Australia 110930 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 2 Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 4a SE of Megali Limni, Lesvos, Greece 100515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 4b SE of Megali Limni, Lesvos, Greece 100515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 5a SW of Dadia, Thracia, Greece 060607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 5b SW of Dadia, Thracia, Greece 060607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 5c SW of Dadia, Thracia, Greece 060607 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus althaeoides 1 Magaluf, Mallorca 110417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus althaeoides 2 Phaistos, Crete 110331 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus althaeoides 3 Agia Galini, Crete 110331 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus althaeoides 4 Agia Galini, Crete 110331 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Convolvulus althaeoides 6 Miradór de Don Martín, Güímar, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus althaeoides 7 Miradór de Don Martín, Güímar, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus althaeoides 8 Miradór de Don Martín, Güímar, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 1 Lund Sk 070720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 2 Lund Sk 070720 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 3 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 4 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 5 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 6 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 7 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 8 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus arvensis 9 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus betonicifolius 1 N of Pefkochori, Greece 050529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus betonicifolius 2 N of Pefkochori, Greece 050529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus canariensis 1 W of 'Green House', Anaga, Tenerife 0670416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus canariensis 2 Jardín Botanico, Gran Canaria 080417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus canariensis 3 Jardín Botanico, Gran Canaria 080417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cantabricus 1 Dadia, Thracia, Greece 060604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cantabricus 2 Bulgarska Polyana, Bu 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cantabricus 4 Bulgarska Polyana, Bu 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cantabricus 5 Bulgarska Polyana, Bu 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cantabricus 6 Dadia, Thracia, Greece 060604 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus capensis 1 N of Klawer, Northern Cape, South Africa 100912 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus capensis 2 N of Klawer, Northern Cape, South Africa 100912 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus capensis 3 N of Klawer, Northern Cape, South Africa 100912 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus capensis 4 N of Klawer, Northern Cape, South Africa 100912 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus caput-medusae 1 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus caput-medusae 2 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus caput-medusae 3 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus caput-medusae 4 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus caput-medusae 5 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cneorum 2 Bergianska, Stockholm 070221 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dahuricus 2 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dahuricus 3 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dahuricus 5 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dahuricus 6 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus floridus 2 Barranco del Infierno, Tenerife 080718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus floridus 3 Barranco del Infierno, Tenerife 080718 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus fruticulosus 4 Pista de los Lomos, La Palma 090427 (Richard Åkesson) - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus fruticulosus 5 Pista de los Lomos, La Palma 090427 (Richard Åkesson) - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus glandulosus 1 Montaneta Redonda, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus glandulosus 2 Montaneta Redonda, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus glandulosus 3 Montaneta Redonda, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus glandulosus 4 Montaneta Redonda, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus glandulosus 5 Montaneta Redonda, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus humilis 1 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus humilis 2 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus humilis 3 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus humilis 4 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus humilis 5 Copenhagen Bot Garden 130821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus humilis 6 Copenhagen Bot Garden 150812 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 1 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 10 Lake Alcañíz, NE Spain 180521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 11 Lake Alcañíz, NE Spain 180521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 12 Lake Alcañíz, NE Spain 180521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Convolvulus lineatus 3 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Convolvulus lineatus 6 Copenhagen Bot Garden 080710 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 7 Lake Alcañíz, NE Spain 180521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 8 Lake Alcañíz, NE Spain 180521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus lineatus 9 Lake Alcañíz, NE Spain 180521 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 10 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 11 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 12 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 4 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 5 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 6 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 9 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 1 Stehag, Skåne 810721 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 2 N of Burgsvik, Gotland 910728 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 3 Arild, Brunnby Sk 140717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 4 Arild, Brunnby Sk 140717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 5 Arild, Brunnby Sk 140717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 6 Arild, Brunnby Sk 140717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 7 Arild, Brunnby Sk 140717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus pulcher 8 Arild, Brunnby Sk 140717 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus sabatius 1 Lund Bot Garden 090708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus sabatius 2 Lund Bot Garden 090708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus scoparius 6 Cercados de Espinos, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus sepium ssp sepium 1 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus sepium ssp sepium 4 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus siculus 1 Las Tricias, La Palma 070420 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus siculus 2 Las Tricias, La Palma 070420 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 1 Newport Beach, CA 130413 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 3 Newport Beach, CA 130413 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 4 W of Hanstholm, Jylland DK 060806 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 5 Tvorup Klitplantage, Jylland DK 230802 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 7 Tvorup Klitplantage, Jylland DK 230802 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 8 Tvorup Klitplantage, Jylland DK 230802 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus strachydifolius 1 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus strachydifolius 2 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus strachydifolius 3 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus strachydifolius 4 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus trabutianus 1 S of Agadir, Morocco 140220 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus trabutianus 2 S of Agadir, Morocco 140220 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus trabutianus 3 S of Agadir, Morocco 140220 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus trabutianus 4 S of Agadir, Morocco 140220 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus trabutianus 5 S of Agadir, Morocco 140220 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus trabutianus 6 S of Agadir, Morocco 140220 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus tricolor Bergianska, Stockholm 060821 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus tuguriorum 1 Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus tuguriorum 3 Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus tuguriorum 4 Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus volubilis 1 La Palmita Bot Garden, La Gomera 060422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus volubilis 2 La Palmita Bot Garden, La Gomera 060422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 3a Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 3b Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus 3c Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus betonicifolius 3 N of Pefkochori, Greece 050529 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cantabricus 3 Bulgarska Polyana, Bu 120507 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus cneorum 1 Bergianska, Stockholm 070221 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dahuricus 1 Onslunda Sk 140620 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dahuricus 4 Jämjö, Häljarum, Blekinge 110813 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dorycnium 1 Amopi, Karpathos, Greece 040523 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus dorycnium 2 Amopi, Karpathos, Greece 040523 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus floridus 1 Barranco del Infierno, Tenerife 080418 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus floridus 4 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus floridus 5 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus fruticulosus 1 Barranco Angustias, La Palma 090502 (Richard Åkesson) - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus fruticulosus 2 Barranco Angustias, La Palma 090502 (Richard Åkesson) - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus fruticulosus 3 Pista de los Lomos, La Palma 090427 (Richard Åkesson) - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus oleifolius 1 Amopi, Karpathos, Greece 040517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus oleifolius 2 Amopi, Karpathos, Greece 040517 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 1 Masca, Tenerife 060417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 2 Masca, Tenerife 060417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 3 Masca, Tenerife 060417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 7 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus perraudierei 8 Barr. de Masca, Tenerife 160408 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus scoparius 1 Cercados de Espinos, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus scoparius 2 Cercados de Espinos, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus scoparius 3 Cercados de Espinos, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus scoparius 4 Cercados de Espinos, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus scoparius 5 Cercados de Espinos, Gran Canaria 080411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus sepium ssp sepium 2 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus sepium ssp sepium 3 Copenhagen Bot Garden 130625 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 2 Newport Beach, CA 130413 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus soldanella 6 Tvorup Klitplantage, Jylland DK 230802 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Convolvulus tuguriorum 2 Baring Head SE of Wellington NZ 151115 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).