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,
Via Cassia cannot have been earlier than 187 BC, when the consul Gaius Flaminius constructed a road from Bononia to Arretium, which must have coincided with a portion of the later Via Cassia. It is not mentioned by any ancient authorities before the time of Cicero, who in 45 BC speaks of the existence of three roads from Rome to Mutina: the Flaminia, the Aurelia and the Cassia. A milestone of AD 124 mentions repairs to the road made by Hadrian from the boundary of the territory of Clusium to Florentia, a distance of . The Via Amerina was a road that