If you examine a sufficient number of individual Saguaros, eventually you will encounter a “cristate” specimen. Cristate, or crested, Saguaros display abnormal growth patterns, most often wildly fan-shaped. The condition that causes this aberrant growth in Saguaros (as well as in other plants) is called fasciation, and it occurs quite rarely. This means that the discovery of one of these unique cacti is an exceptional find indeed.