Cinnamomum cassia United Kingdom, and India is Chinese cinnamon. "Indonesian cinnamon" ("C. burmannii") is sold in much smaller amounts. Chinese cassia is produced in both China and Vietnam. Until the 1960s, Vietnam was the world's most important producer of Saigon cinnamon, which has a higher oil content , and consequently has a stronger flavor. Because of the disruption caused by the Vietnam War, however, production of Indonesian cassia in the highlands of the Indonesia island of Sumatra was increased to meet demand. Indonesian cassia has the lowest oil content of the three types of cassia, so commands the lowest price. Chinese cassia
Cassia marksiana endangered. It is a small to medium-sized tree, up to 25 m tall and a stem diameter of 50 cm. The trunk is not buttressed, with grey-brown wrinkled bark. Compound leaves are alternate on the stem, with four to 16 leaflets, 2.5 to 7.5 cm long, usually opposite the leaf stem. Leaflets vary in shape, mostly lanceolate or ovate-lanceolate and broader. Leaf veins easily noticed. Showy and attractive yellow flowers form on racemes from September to November. A long, thin pod matures from June to October, 30 cm long and 2 cm in diameter. Cassia marksiana Cassia marksiana, Marks cassia,