Ferocactus viridescens
Encyclopedia
Ferocactus viridescens is a rare species of barrel cactus
Barrel cactus
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 metre in height. Its ribs are...

 known by several common names, including Coast barrel cactus and San Diego barrel cactus. It is native to southern California
Southern California
Southern California is a megaregion, or megapolitan area, in the southern area of the U.S. state of California. Large urban areas include Greater Los Angeles and Greater San Diego. The urban area stretches along the coast from Ventura through the Southland and Inland Empire to San Diego...

 and northern Baja California
Baja California
Baja California officially Estado Libre y Soberano de Baja California is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is both the northernmost and westernmost state of Mexico. Before becoming a state in 1953, the area was known as the North...

. Most of its native range is in San Diego County, California
San Diego County, California
San Diego County is a large county located in the southwestern corner of the US state of California. Hence, San Diego County is also located in the southwestern corner of the 48 contiguous United States. Its county seat and largest city is San Diego. Its population was about 2,813,835 in the 2000...

, where it is threatened by development, agriculture, and other alterations in its habitat.

This cactus is spherical, oblate, or nearly cylindrical, is usually wider than tall, and less than 30 centimeters in height. The flesh is bright green and arranged into several ribs covered in arrays of long spines. The spines stick straight out and may curve a bit, and are red when new, dulling to gray or tan. The cactus blooms in yellow to greenish flowers with red or pink scales. The fruit is yellow or red.

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