Formerly known as Haworthia Attenuata, these plants are native to the Eastern Cape province of South Africa. They closely resemble an aloe plant; in fact, they are from the same subfamily. They have pointy leaves with zebra-like white stripes that appear as warty growth.
When touched, you can feel the little bumps or ridges from these white stripes. They can be grown indoors or outdoors and can tolerate different lighting conditions.
These are one of those succulent plants that would do well both indoors and out. They are slow growers at first, but can grow rapidly and produce pups and offsets once established.
Source: Succulent Plant Care