Stromanthe is a genus of flowering plants in the family Marantaceae, placed in the order Zingiberales. It comprises roughly 20–25 species of herbaceous perennials native to the tropical Americas, with its range extending from southern Mexico and Central America south through Colombia, Venezuela, Ecuador, Peru, and Brazil to northern Argentina, as well as Trinidad.
Members of the genus share the characteristic features of the Marantaceae family: large, often ornately patterned leaves with a conspicuous midrib and a distinct pulvinus (swollen leaf base) that enables the leaves to track light and fold at night — a behaviour sometimes called “prayer plant movement.” The leaves are typically oblong to lanceolate and may display contrasting coloration on the upper and lower surfaces.
Stromanthe is most diverse in Brazil, where several species are endemic to specific regions such as Bahia and the Atlantic Forest zone. The genus was described by Wilhelm Sonder and published in Neue Allgemeiner Deutscher Garten- und Blumenzeitung in 1849. It has historically been closely allied with Calathea and Ctenanthe within Marantaceae; taxonomic revisions have moved some species between these genera over time. The most widely cultivated species is Stromanthe thalia (syn. S. sanguinea), grown as a houseplant and in tropical gardens for its vivid red-and-green foliage and small white to pinkish flowers.
Etymology
The genus name Stromanthe derives from the Greek words stroma (a bed or mattress, referring to a layer or covering) and anthos (flower), alluding to the arrangement of the bracts or the form of the inflorescence. It was established by Wilhelm Sonder in 1849.
Distribution
Stromanthe is native to tropical portions of the Americas, ranging from southern Mexico and Central America (including Guatemala, Honduras, Belize, Nicaragua, Costa Rica, and Panama) through Colombia, Venezuela, Ecuador, Peru, and Brazil to northern Argentina, with one species reaching Trinidad. The centre of diversity lies in Brazil, particularly in the Atlantic Forest and Amazonian regions.
Cultivation
Species such as Stromanthe thalia (commonly sold as S. sanguinea or the 'Triostar' cultivar) are cultivated as houseplants and in tropical or subtropical gardens. They favour bright indirect light, consistently moist but well-drained soil, high humidity, and warm temperatures above 15 °C. Direct sun bleaches the foliage; low humidity causes leaf-edge browning.
