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 sieberiana of time. September through February is when the fruit reaches maturity. The tree is named "sindia "in the Wolof language, and "sinjan "in Bambara language, which literally means "long breast," a reference to the shape of the seed pods. "Cassia sieberiana" is found in multiple parts of Africa including the southern part of the Sahel, Senegal, Sudan, and Uganda. It is also found in East Africa. "Cassia sieberiana" grows best in well drained, humid soils with an annual rainfall of approximately 20 inches. It typically grows as a shrub in very dry regions. These shrubs grow in groups of other