Haworthia chloracantha
Origin and Habitat: South Africa.
Leaves: 3,5-4 cm long, slender, lanceolate-accuminae, erect, not spreading, mid or pale green to yellowish green, fleshy, firm in texture, but the distal third often dried and brown; margin and keel, not lineate, unevenly and finely serrated with small teeth the same colour as the leaf or darker.
Flowers: Whitish.
is a low growing heavily suckering succulent that forms crowded clusters. Has small rosettes wit with 18 to 25 stiff, erect, yellowish green leaves.
Cultivation and Propagation: Haworthia are of easy cultivation and relatively low maintenance, which makes them a good houseplant, and can be an excellent subject for the beginning succulentophile (they can grow easily on window sills, verandas and in miniature succulent gardens where they are happy to share their habitat with other smaller succulent plants, or in outdoor rockeries). Haworthias are winter growers and are dormant in the hottest summer months.
Growth rate: They are relatively fast-growing plants that offsets freely to form small clusters quickly.
Exposition: The plant needs light shade to shade, but will take full sun part of the day. (with some sun exposure the leaf develops a nice reddish tint and remains compact)
Watering: During the hot summer months, the soil should be kept moist but not overly wet. During the winter months, water only when the soil becomes completely dry. Wet soil quickly causes root and stem rot, especially during chilly winter months. . No water should ever be allowed to stand around the roots. Low ambient humidity is always needed.
Hardiness: Although the plant will survive mild frost if kept dry (hardy as low as -5° C) it should be protected from severe cold and prolonged frost conditions.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz