Cinnamomum cassia elongated leaves that are long and have a decidedly reddish colour when young. Chinese cassia is a close relative to Ceylon cinnamon ("C. verum"), Saigon cinnamon ("C. loureiroi"), also known as "Vietnamese cinnamon", Indonesian cinnamon ("C. burmannii"), also called "korintje", and Malabar cinnamon ("C. citriodorum") from Sri Lanka. In all five species, the dried bark is used as a spice. Chinese cassia's flavour is less delicate than that of Ceylon cinnamon. Its bark is thicker, more difficult to crush, and has a rougher texture than that of Ceylon cinnamon. Most of the spice sold as cinnamon in the United States,
Cassia fistula and the tree was depicted on a 20-rupee stamp. The golden rain tree is the national flower of Thailand; its yellow flowers symbolize Thai royalty. A 2006–2007 flower festival, the Royal Flora Ratchaphruek, was named after the tree, which is known in Thai as" ratchaphruek" (Thai: ราชพฤกษ์) and the blossoms commonly referred to as "dok koon" (Thai: ดอกคูน). "C. fistula" is also featured on a 2003 joint Canadian-Thai design for a 48-cent stamp, part of a series featuring national emblems. "Cassia acutifolia", the pudding-pipe tree, furnishes the cassia pods of commerce. In Laos, its blooming flowers known locally as "dok