organpipe cactus Cactaceae Stenocereus thurberi
Leaf:Reduced to a dark spine, central spine(s) up to 2 inches and lateral spines 1/2 inch, displayed in vertical rows along the bark ridges, areole clusters of 10-14 spines less than 1 inch apart.
Flower:Attractive, white to purple (with white edges), 3 inches across, blooming at night during early summer, persisting for less than 24 hours, appearing at the branch tips.
Fruit:A nearly round berry, densely thorny, 1 1/2 inches, green ripening to red.
Bark:A green, leathery thick skin with 12-17 prominent vertical ridges.
Form:Clustered, unbranched column-like branches sweeping upward from a central point, to 20 feet tall, clumps to 15 feet wide, individual stems approximately 6-8 inches in diameter.