This forms a clump of several stems, each about the shape and size of a cucumber, and armed with bunches of long, stiff spines. The flowers are two or three inches long, with deep red petals, dull pink anthers, and a bright green pistil. This grows in the Grand Canyon. There are many kinds of Opuntia, with jointed stems, cylindrical or flattened, armed with bristles, usually with spines. The fruits and fleshy joints are good for fodder, if the spines are removed, and hence there has been much inquiry into the economic value of these plants. It has been found that the spiny species are the most valuable for fodder, under extremely arid conditions, as the spines can be burned off, while the unarmed forms are subject to the attacks of so many animals that a crop cannot be secured without the protection of fences. The spines are removed either by singeing the growing plant with a torch, or the upper parts are cut off and thrown into a fire, or sometimes the plants are made into fodder by being chopped up, spines and all, in a machine. The Prickly Pears in Sicily and the Orient came from America.
Hedgehog Cactus. Ecfiinocereus polyacanthus.