This large group consisting of succulent plants is found in subtropical and tropical countries throughout the world.
Some species make excellent houseplants.
In early spring or fall, bell-shaped flowers that may be white, red, purple, yellow, orange, or brown are produced. They grow at the stem tips and are followed by small, brown seedpods. K. rhombopilosa is an interesting plant that produces flat whorls of grayish-green to white leaves that are usually splotched with red. The leaves grow on short, erect stems that form a small, prostrate bush with age. In the spring, tiny, greenish-yellow flowers are borne.