Senna siamea, commonly known as Siamese cassia or kassod tree, is an evergreen tree native to open woodlands and forest edges in South and Southeast Asia. It can grow up to 60 feet tall and is characterized by its bright yellow flowers that bloom in clusters. The flowering season typically occurs during the warm months, and the flowers are moderately showy, attracting pollinators such as bees and butterflies. The tree also produces long, flat seed pods that are initially green, turning brown as they mature.

Siamese cassia is valued for its dense canopy, which provides excellent shade, making it a popular choice for intercropping in cocoa, coffee, and tea plantations. Its leaves, tender pods, and seeds are edible but require proper preparation, including boiling and discarding the water to remove toxins. In cultivation, Senna siamea prefers full sun to partial shade, well-drained soils, and moderate watering, although it is tolerant of drought once established. It is also used for its ornamental value in tropical and subtropical landscapes and can serve as a windbreak or living fence. However, gardeners should be aware that it can become invasive outside its native range, and its aggressive roots may cause problems if planted near buildings or pavement.CC BY-SA 4.0