Gasteria acinacifolia 1 Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria acinacifolia 2 Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria acinacifolia 3 Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria bicolor 1 Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria bicolor 2 Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria brachyphylla Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria carinata 1 De Hoop, Western Cape, South Africa 100921 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria carinata 2 De Hoop, Western Cape, South Africa 100921 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria carinata 3 De Hoop, Western Cape, South Africa 100921 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria carinata var verrucosa Lund Bot Garden 090213 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria croucheri 2 Puerto de la Cruz Bot Garden, Tenerife 160410 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria croucheri 3 Puerto de la Cruz Bot Garden, Tenerife 160410 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria disticha 1 Minwater SW of Oudtshoorn, Western Cape, South Africa 161004 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria disticha 2 Minwater SW of Oudtshoorn, Western Cape, South Africa 161004 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria disticha 4 Swartberg Pass NW of Oudtshoorn, Western Cape, South Africa 161005 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria ernestii 1 Lund Bot Garden 150503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria ernestii 2 Lund Bot Garden 150503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria ernestii 5 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria ernestii 6 Lund Bot Garden 150503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria glomerata 5 Lund Bot Garden 150422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria glomerata 6 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria nitida 1 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria nitida 2 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria nitida var armstrongii 2 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria nitida var armstrongii 3 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria plicatilis 1 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria plicatilis 2 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria plicatilis 3 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria plicatilis 5 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria trigona 3 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria croucheri 1 Puerto de la Cruz Bot Garden, Tenerife 160410 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria disticha 3 Minwater SW of Oudtshoorn, Western Cape, South Africa 161004 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria disticha 5 Swartberg Pass NW of Oudtshoorn, Western Cape, South Africa 161005 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria ernestii 3 Lund Bot Garden 150503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria ernestii 4 Lund Bot Garden 150503 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria glomerata 1 Lund Bot Garden 150422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria glomerata 2 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria glomerata 3 Lund Bot Garden 150422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria glomerata 4 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria nitida var armstrongii 1 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria plicatilis 4 Lund Bot Garden 130903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria rawlinsonii 1 Copenhagen Bot Garden 121205 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria rawlinsonii 2 Copenhagen Bot Garden 121205 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria trigona 1 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Gasteria trigona 2 Lund Bot Garden 150425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).