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.-

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

Houseleek, Sempervivum, Detail of yellow coloured plant showing pattern.-

Larch, Larix decidua, Cones growing on branch of tree with spiky leaves.

Larch, Larix decidua, Cones growing on branch of tree with spiky leaves.

Larch, Larix decidua, Cone growing on branch of tree with spiky leaves.