Maclura tinctoria, formerly morus tinctoria and commonly known as Old Fustic or Dyer's mulberry is a medium to large tree of the Neotropics, from Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 to Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

. It produces a yellow dye

Dye

A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....

 called fustic primarily known for coloring khaki

Khaki

This article is about the fabric. For the color, see Khaki . Kaki, another name for the persimmon, is often misspelled "Khaki".Khaki is a type of fabric or the color of such fabric...

 fabric for U.S. military apparel during World War I. This dye contains the flavonoid morin

Morin (flavonoid)

Morin is a chemical compound. It is a yellow color substance that can be isolated from Maclura pomifera , Maclura tinctoria and from leaves of Psidium guajava ....

.

Old fustic is not to be confused with Young Fustic (Rhus cotinus) from southern Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 and Asia

Asia

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

, which provides a more fugitive colour.

Dyeing

Fustic is a bright yellow dye that is very color-fast when used with mordant

Mordant

A mordant is a substance used to set dyes on fabrics or tissue sections by forming a coordination complex with the dye which then attaches to the fabric or tissue. It may be used for dyeing fabrics, or for intensifying stains in cell or tissue preparations. The term mordant comes from the Latin...

s. It is frequently combined with other dyestuffs and various mordants to produce a range of yellow and greenish colors:

• With woad
  Woad
  Isatis tinctoria, with Woad as the common name, is a flowering plant in the family Brassicaceae. It is commonly called dyer's woad, and sometimes incorrectly listed as Isatis indigotica . It is occasionally known as Asp of Jerusalem...
  
   or indigo
  Indigo
  Indigo is a color named after the purple dye derived from the plant Indigofera tinctoria and related species. The color is placed on the electromagnetic spectrum between about 420 and 450 nm in wavelength, placing it between blue and violet...
  
  : bright or Saxon greens
• With bichromate of potash
  Potash
  Potash is the common name for various mined and manufactured salts that contain potassium in water-soluble form. In some rare cases, potash can be formed with traces of organic materials such as plant remains, and this was the major historical source for it before the industrial era...
  
  : old gold
• With logwood
  Logwood
  Haematoxylum campechianum is a species of flowering tree in the legume family, Fabaceae, that is native to southern Mexico and northern Central America. It has been and to a lesser extent remains of great economic importance. The modern nation of Belize grew from 17th century English logwood...
  
   and bichromate of potash: greenish yellows
• With copper sulfate: olive greens
• With ferrous sulfate: dark greens