Indian Sandalwood

Santalum album is a small, hemiparasitic evergreen tree reaching heights of 4 to 20 meters, distinguished by its dense, fragrant heartwood that has made it one of the most economically valuable trees in the world. As a root hemiparasite, it draws water and nutrients from the roots of neighboring host plants while photosynthesizing independently, a strategy that shapes its distribution within mixed forest communities and links its survival to the presence of suitable host species. Its small, bell-shaped flowers attract insect pollinators, and birds disperse its seeds, giving the species a modest but functional role in local forest ecology.

The species is native to the Indian subcontinent, particularly southern India and Sri Lanka, and has established or naturalized populations across Indonesia, Thailand, China, Australia, Fiji, the Cook Islands, and French Polynesia. It typically grows in tropical and subtropical moist lowland forests, often on rocky or well-drained terrain, from sea level up to around 1,000 meters elevation.

Population decline stems from a combination of pressures: livestock grazing damages seedlings and disrupts regeneration, native pathogens and pest species (including spike disease) weaken mature trees, and recurring fires degrade habitat. Unregulated harvesting of the heartwood, driven by demand for oil and timber, has historically caused severe depletion, particularly in wild populations outside cultivation.

Conservation responses include regulated cultivation and plantation programs in India and Australia, export and harvest controls, and research into disease-resistant strains. Some populations occur within protected forest reserves. Despite these measures, wild populations continue to decline due to ongoing illegal harvesting and habitat pressures, and the species remains classified as Vulnerable, with recovery dependent on sustained enforcement and expanded cultivated supply to reduce pressure on remaining wild stands.