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 marksiana Cassia marksiana Cassia marksiana, Marks cassia, is an Australian rainforest tree growing in far north eastern New South Wales and in south eastern Queensland. The common name is in honour of Dr. C. F. Marks, an early botanical collector. Other common names include cigar cassia, brush cassia, and native laburnum. The Brunswick River is considered the southernmost point of natural distribution. Its habitat is seaside and lowland subtropical rainforest, which is almost completely destroyed, with only small remnant patches remaining. Less than 100 trees are known to exist in the wild in some 20 locations. Consequently, it is listed as