English names: Wheel cactus, nopal tapon
Latin name: Opuntia robusta
Family: Cactus – Cactaceae
This species usually reaches a height of 1 metre, though it may grow even to three metres tall when supported. The flattened stem segments are round, fleshy and blue-grey in colour. About 30 cm. in diameter, they are protected by sharp spines, about 5 cm. long. The yellow flowers, with a fleshy base, grow from the edges of the upper stem segments. The pink, barrel-shaped fruits grow up to 8 cm. long.