Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ferocactus echidne is a barrel cactus in the genus Ferocactus. It is found in nature in Mexico. This cactus is known commonly as "Sonora Barrel," "Coville's Barrel Cactus," "Emory's Barrel Cactus," and "Traveler's Friend." Alternatively is has been assigned the binomials Echinocactus emoryi, Ferocactus rectispinus, and Ferocactus covillei. The barrel cactus is a member of the plant family Cactaceae, characterized by being approximately barrel-shaped. Barrel cacti are classified into the two genera Echinocactus and Ferocactus, both of which are found in the Southwest Desert of North America. Their pineapple-shaped fruits can be easily removed but are not recommended for eating. The barrel cactus may reach over a meter in height. Its ribs are numerous and pronounced and the spines are long and yellow. Small yellow flowers appear around the end of the plant only after many years. It is considered easy to grow and relatively fast growing. They may also produce round offshoots from the main stem, called pups.

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