The beans were formerly also spelled "tonquin" and "tonkin", although it has no connection with Tonkin, now part of Vietnam. Tonquin is still used today to flavor some pipe tobaccos, such as Samuel Gawith "1792 Flake." Cumaru, also known as Brazilian teak, is an increasingly popular hardwood used for flooring in the United States. It has a very appealing natural color variation and is considered quite durable as it has a 3540 rating on the Janka hardness scale. Cumaru decking has a Class A fire-resistance rating, because it has a flame spread Index of 20.