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 leptophylla Cassia leptophylla Cassia leptophylla is a tropical tree species in the genus "Cassia", which is indigenous to Brazil. It is named gold medallion tree and has yellow flowers that bloom intermittently throughout the year, spawning seedpods that are square in cross section and rattle festively. Recognized by its thin green foliage with glossy green pinnate leaflets. The fruit is a long thin seedpod with four sides. "Cassia leptophylla" is native to southeastern Brazil. This tree does not have many uses, except as a decorative tree or as a laxative, something common to the "Cassia" genus. Seed is poisonous if ingested.