Cinnamomum cassia component called coumarin, which could damage the liver if consumed in larger amounts, European health agencies have warned against consuming high amounts of cassia. Other bioactive compounds found in the bark, powder and essential oils of "C. cassia" are cinnamaldehyde and styrene. In high doses these substances can also be toxic for humans. Cinnamomum cassia Cinnamomum cassia, called Chinese cassia or Chinese cinnamon, is an evergreen tree originating in southern China, and widely cultivated there and elsewhere in southern and eastern Asia (India, Indonesia, Laos, Malaysia, Taiwan, Thailand, and Vietnam). It is one of several species of "Cinnamomum" used primarily
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,