Succulent plants are plants that have adapted to very dry climates. They have adapted in such a way that they can store water, either in their leaves, stems or roots. Very often, they look different than plants that do not do this. Their leaves may look more fleshy. A very good example of succulents are the cacti. Almost all cacti are succulents. Not all succulents are cacti though. Other plant families with this property are the agavaceae (Agave family), Azioaceae and Crassulaceae. Other well-known succulents are the Aloe and the Bottle tree.
The bottle tree stores water in its trunk, that looks like a bottle
The Jade plant, or friendship tree
Prickly pear is a kind of cactus