[header] How to understand the characteristics of cacti [title] Note that the fruit of a cactus must be a one-celled berry. [step] The fruit of the cacti are made up of a flavored mass of pulp. Seeds are sprinkled throughout this mass. 
The one-celled berry may be dry or juicy, smooth, scaly, or spiny. Often the one-celled fruit is large and brightly colored.