The genus Haematoxylum, commonly known as logwood, is a group of flowering plants belonging to the legume family. This genus is known for its valuable wood, which is used to produce dyes and ink. There are a few synonyms for the word Haematoxylum, including Haematoxylon, which is the former genus name before it was changed in the early 1900s. The wood is also sometimes referred to as Campeachy wood, named after the port in Mexico where the best quality logwood comes from. Additionally, logwood is sometimes called bloodwood due to the deep red color of the dye produced from its wood. Overall, the genus Haematoxylum and its various synonyms are important to know for anyone working in the field of natural dyes and pigments.