Heliotropium (Ceballosia fruticosa) 3 Teno, Tenerife 090513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 4 Teno, Tenerife 090513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 5 Teno, Tenerife 090513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 6 Teno, Tenerife 090513 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 7 Teno, Tenerife 160404 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 8 Teno, Tenerife 160404 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Tournefortia argentea) 1 (cult) Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Tournefortia argentea) 3 (cult) Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Tournefortia argentea) 4 (cult) Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Tournefortia argentea) 5 (cult) Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Tournefortia argentea) 6 (cult) Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 3a Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium arborescens 1 Lund Botanical Garden 130826 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium arborescens 2 Lund Botanical Garden 130826 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium arborescens 3 Lund Botanical Garden 130826 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium arborescens 4 Lund Botanical Garden 130826 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium cf dolosum 2 Arkasa, Karpathos, Greece 040520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 1 Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 2 Kanaha Beach Park, Kahului, Maui, Hawaii 130715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 4 Crystal Cove State Park 1, Newport Beach, CA 130414 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 5 Crystal Cove State Park 1, Newport Beach, CA 130414 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 6 Kanaha Beach Park, Kahului, Maui, Hawaii 130715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium erosum 1 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium erosum 2 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium erosum 3 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium erosum 4 Punta de Arinaga, Gran Canaria 080406 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium europaeum 1 Lund Bot Garden 130829 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium europaeum 10 Lund Bot Garden 150901 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Heliotropium europaeum 3 Lund Bot Garden 130829 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

Heliotropium europaeum 5 Copenhagen Bot Garden 140719 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium europaeum 6 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium ramosissimum 1 Punta de Honduras N of Las Eras, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium ramosissimum 3 Puertito de Güímar, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium ramosissimum 4 Puertito de Güímar, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium ramosissimum Playa de El Médano, Tenerife 970320 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium ramosissimum Puerto de Güimar, Tenerife 940311 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 1 Playa de San Marcos, Tenerife 940310 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Ceballosia fruticosa) 2 Puerto de La Cruz, Tenerife 940310 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium (Tournefortia argentea) 2 (cult) Sandy Beach Park, Oahu, Hawaii 130708 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 1a Bergianska, Stockholm 010831 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 1b Bergianska, Stockholm 010831 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 2a De Hoop Vlei, Western Cape, South Africa 011024 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 2b De Hoop Vlei, Western Cape, South Africa 011024 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 3b Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 4a Dadia, Thracia, Greece 060608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium 4b Dadia, Thracia, Greece 060608 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium cf dolosum 1 Arkasa, Karpathos, Greece 040520 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 3 Kanaha Beach Park, Kahului, Maui, Hawaii 130715 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium curassavicum 7 Crystal Cove State Park 1, Newport Beach, CA 130414 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium europaeum 7 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium europaeum 8 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium europaeum 9 near Trujillo SP 140510 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Heliotropium ramosissimum 2 Puertito de Güímar, Tenerife 160405 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).