Sansevieria

Sansevieria is a genus of flowering plants in the family Asparagaceae, commonly known as snake plant, mother-in-law's tongue, or bowstring hemp. The genus has historically included around 70 species native to tropical Africa and parts of Asia. In modern classifications, many species that were placed in Sansevieria have been transferred to the genus Dracaena, and some authorities treat Sansevieria as a synonym of Dracaena. The cultivated snake plant is often referred to as Dracaena trifasciata, formerly Sansevieria trifasciata.

Plants are evergreen perennials forming rosettes of stiff, upright leaves that arise from rhizomes. Leaves are typically sword-shaped, with dark green bands or cross-banding and lighter edges; some cultivars have yellow margins or are solid green. They vary from compact dwarf forms to tall rosettes over a meter tall.

Snake plants are highly drought-tolerant and can tolerate low light, though variegated forms prefer brighter conditions. Use a well-draining potting mix and avoid overwatering, which can cause root rot. They do well in normal room temperatures and are sensitive to frost.

Commonly grown as indoor ornamentals, Sansevieria are valued for architectural foliage and easy care. They are also reputed to improve indoor air quality by removing certain pollutants, though laboratory results vary. Parts of the plant can be toxic if ingested by humans or pets.

Notable cultivars include Sansevieria trifasciata 'Laurentii' (yellow margins), 'Moonshine' (pale gray-green leaves), and the compact 'Hahnii' group. Propagation is by leaf or rhizome cuttings or division.