Cactus, Prickly Pear Cactus, Opuntia cochenillifera, Detail of spiky plant against blue sky.-

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

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

Cactus, Pincushion Cactus, Mammillaria bombycina, Aerial view of spiky plants.-

Hellebore, Helleborus, Detail of mauve coloured flowers growing outdoor.-

Cactus, Barrel cactus, Erocactus echidne, 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.-

Euphorbia echinus, Detail showing the pattern of spiky needles.-

Cactus, Golden Barrel Catus, Echinocactus Grusonii var. Subinermis, Aerial view showing pattern of the spiky needles.-

Euphorbia echinus, Mass of green spiky plants growing outdoor.-

Cactus, Golden Barrel Cactus, Echinocactus grusonii, Detail of spiky plant showing mass of needles.-