Butea is a small genus of flowering trees and woody climbers in the legume family Fabaceae (order Fabales), native to the Indian Subcontinent, Indochina, Tibet, and southern China. Depending on the taxonomic treatment applied, the genus encompasses two to five species; current consensus recognises five accepted species, including the ecologically and culturally significant Butea monosperma and Butea superba.
The most prominent member, Butea monosperma, is a medium-sized deciduous tree renowned for its brilliant flame-orange flower clusters, earning it the common names flame-of-the-forest, bastard teak, and pâlāsh. It is highly valued across South and Southeast Asia for its timber, gum resin (known as Bengal kino), fodder, and use in traditional Ayurvedic medicine, where it is called kiṃśukha in Sanskrit. The genus also serves an unusual ecological role as a host tree for the lac insect (Kerria lacca), which produces the natural resin used in lacquer production.
The genus was erected by William Roxburgh in 1795, though his publication was later deemed a nomen invalidum; Carl Willdenow formally validated the name Butea in 1802. It honours John Stuart, 3rd Earl of Bute (1713–1792), a British prime minister and notable patron of botany. Of the forty-two names ever published under Butea, forty have since been reduced to synonymy or transferred to other genera.
Etymology
The genus Butea is named in honour of John Stuart, 3rd Earl of Bute (1713–1792), a British prime minister and prominent patron of botany. The name was first used by William Roxburgh in 1795, but that publication was invalid; Carl Willdenow formally established the name in 1802.
Distribution
Butea species are distributed across the Indian Subcontinent (India, Bangladesh, Sri Lanka), Indochina (Myanmar, Thailand, Vietnam), and extend into Tibet and southern China. Individual species have more restricted ranges: B. monosperma spans the Indian subcontinent through Indochina to southern China, while B. xizangensis is confined to Tibet and B. pellita to the central Himalayas.
Cultural Uses
Butea monosperma has been used extensively across South Asia for millennia. In Ayurvedic medicine it is known as kiṃśukha and employed to treat a range of conditions. Its bark yields Bengal kino resin, used medicinally and in tanning; the wood serves as timber and the leaves as fodder. The genus also hosts the lac insect, making Butea trees important in the traditional production of natural lacquer and shellac.
