Living Rock Cactus (image) American Journal of Botany Caption A "living rock" cactus (Ariocarpus fissuratus) in a large container on the roof of the biology building of Occidental College, Los Angeles, in June 2008 after 8 days of high temperatures. This particular plants was embedded in sandy soil with surface rocks. Scale bar = 10 mm. Credit Gretchen B. North, Occidental College, Los Angeles Usage Restrictions Cite credit line and original publication. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.