Haworthia

Haworthia is a genus of flowering plants within the family Asphodelaceae. They are small (typically 20 cm high) solitary or clump-forming and endemic to South Africa. Some species have firm, tough leaves, usually dark green in color, whereas other are soft and semi-translucent. Their flowers are small, white and very similar between species. But their leaves show wide variations even within one species.
Many make ideal houseplants and will survive in less sunny positions than other succulent plants.