"Dinosaur Back" Cactus, Take #1 – Desert Botanical Garden, Papago Park, Phoenix, Arizona

Myrtillocactus geometrizans forma cristata (sometimes known as the "Dinosaur Back Plant") is an interesting waxy blue cactus that forms a tree-like trunk which has a tendency to fan out clustering over one another. Occasionally, when new branches form out from a crest they may revert to the normal growth pattern, giving rise to a more bizarre appearance.