blue myrtle-cactus Cactaceae Myrtillocactus geometrizans

Leaf:Reduced to a dark spine, displayed in vertical rows along the bark ridges, areole clusters of 3-9 spines approximately 1 inch apart.
Flower:Attractive, creamy white, 1 1/2 inches across; appearing spring to mid-summer along the ribs.
Fruit:A 1/2 inch red-brown to dark purple, sweet and edible.
Twig:Individual joints are 4 inches in diameter with 5-6 prominent vertical ridges.
Bark:Initially blue-green or gray-green and leathery, becoming gray-brown and somewhat scaly.
Form:A large shrub or a small tree to 15 feet tall, exhibiting a dense candelabra-like branching pattern.

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