barrel cactus Cactaceae Ferocactus wislizeni

Leaf:Reduced to a spine, up to 2 1/2 inches, displayed in dense vertical rows along the bark ridges, areole clusters of 4 large spines (one hooked and thick) and up to 20 axillary spines.
Flower:Attractive, yellow to red, 3 inches across, near the tip of the cactus, blooming late summer.
Fruit:A cylindrical to oval berry, 1 1/2 inches, yellow, dry relative to other cacti, resembling a pineapple.
Twig:
Bark:A green, leathery thick skin with 25 prominent vertical ridges.
Form:One unbranched stout stem up to 10 feet tall and 3 feet wide, but more commonly to 6 feet and 2 feet wide.

leaf fruit bark form map

Notes: