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

Dyckia altissima 3 Jardin Botanico, Puerto de La Cruz, Tenerife 090515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia ferox Copenhagen Bot Garden 120926 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia fosteriana 2 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia fosteriana 3 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

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

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

Dyckia altissima 1 Jardin Botanico, Puerto de La Cruz, Tenerife 090515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia altissima 2 Jardin Botanico, Puerto de La Cruz, Tenerife 090515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia altissima 4 Jardin Botanico, Puerto de La Cruz, Tenerife 090515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia altissima 5 Jardin Botanico, Puerto de La Cruz, Tenerife 090515 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Dyckia fosteriana 1 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).