Agave, Royal agave, Agave victoriae-reginae, Detail of green leaves showing pattern.

Ice plant 'Meteor', Sedum spectabile 'Meteor', Mass of purple coloured flowers growing outdoor.

Houseleek, Sempervivum atlanticum, Close up showing pattern.

Houseleek, Sempervivum atlanticum, Close up showing pattern.

Aloe vera, Three plants growing outdoor in a planter.

Stonecrop, Sedum 'Herbstfreude', Mass of tiny pink flowers growing outdoor.

Cactus, Mexican Giant Cardon, Pachycereus pringlei, Details of spiky plant against blue sky.-

Cactus, Coastal Prickly Pear Cactus, Opuntia littoralis, Detail showing pattern of spiky needles.-

Cactus, Tunicata Cactus, Opuntia tunicata, Detail showing pattern of spiky needles.-

Cactus, Tunicata Cactus, Opuntia tunicata, Detail showing pattern of spiky needles.-

Euphorbia polyacantha, Mass of spiky plants growing outdoor.-

Candelabra tree, Euphorbia candelabrum, Side view showing pattern against a blue sky.-