"Compared to Non-blacks, California’s African-American population are 4 times more likely to be arrested for marijuana, 12 times more likely to be imprisoned for a marijuana felony arrest, and 3 times more likely to be imprisoned per marijuana possession arrest. Overall, as Figure 3 illustrates, these disparities accumulate to 10 times’ greater odds of an African-American being imprisoned for marijuana than other racial/ethnic groups."

Source

Males, Mike, "Misdemeanor marijuana arrests are skyrocketing and other California marijuana enforcement disparities," Center on Juvenile and Criminal Justice (San Francisco, CA: November 2011), p. 6.
http://www.cjcj.org/uploads/c…