Senna siamea, commonly known as Siamese cassia or Thai cassia, is a medium-sized deciduous tree belonging to the Fabaceae family. Here are some key characteristics and uses of Senna siamea:

1. Appearance:
   • Senna siamea is a moderately sized tree with a straight trunk and a rounded crown. It can reach heights of up to 15-20 meters.
2. Leaves:
   • The compound leaves are pinnate, and each leaf is composed of several leaflets. The leaflets are oblong and arranged in pairs along the stem.
3. Flowers:
   • The tree produces fragrant, yellow flowers that are arranged in dense, axillary clusters.
4. Fruit:
   • The fruit is a long, flat pod containing several seeds. The pods turn brown when mature.
5. Geographic Distribution:
   • Senna siamea is native to Southeast Asia, including regions such as Thailand, Myanmar, Cambodia, Laos, and Vietnam.
6. Uses:
   • Wood: The wood of Senna siamea is valued for its durability and is used for various purposes, including construction, furniture, and tool handles.
   • Fodder: The leaves are used as fodder for livestock.
   • Traditional Medicine: Parts of the tree, including the bark, are used in traditional medicine in some regions.
7. Agroforestry:
   • Senna siamea is often planted in agroforestry systems to provide timber, fodder, and other benefits to farmers.
8. Fast Growth:
   • The tree is known for its fast growth, making it a valuable resource for timber production and reforestation projects.

It’s important to note that while Senna siamea has various practical uses, it’s crucial to manage its cultivation and use to prevent potential invasiveness and ecological impacts in certain regions. Additionally, local names for the tree may vary in different areas.