The large family of cacti encompasses more than 2000 plants, all of which are succulents.

Hardly any plant group reveals so many varied, sometimes bizarre, types of plant structure, leaves, and flowers as the succulents.

Hoya is an evergreen vine with shoots 3.2 ft. (1m) long and slightly succulent, dark green leaves.

Orchids are among the most treasured plants, but they also make up the most numerous plant family.