Senna siamea

Leaves are alternate, pinnately compound, with slender, green-reddish, tinged axis and 6 to 12 pairs of leaflets on short stalks, rounded at both ends.

In Thailand it is the provincial tree of Chaiyaphum Province and some places in the country are named after it.

The leaves, tender pods and seeds are edible, but they must be previously boiled and the water discarded.

In this capacity it is known as pheasantwood or polohala, named for the similarity of the grain to pheasant feathers.

[9] It is sold in Asian pharmacies, mostly as a sleep aid, but also to treat constipation and as a hair balm.

Leaves and flowers
Kaeng khilek , a Thai curry made with kassod leaves and flower buds
Wood from S. siamea (鉄刀木) is highly valued in Chinese furniture making.
Senna siamea tablets found in Bangkok