Cactus flowers bloom in a rainbow of colors. The look of a cactus can be quite deceiving. Spiny, leafless desert cacti, mostly native to North and South America, transform into some of the most dazzling plants when in bloom. Belonging to the Cactaceae plant family, more than 1,000 different species of cacti exist, including those of the tropical variety that are indigenous to Brazil. (Read more: http://www.ehow.com/info_7988034_cactus-flowers.html#ixzz2mRPC36sQ)