Fustic.

Fustic. The dyestuff sometimes termed Old Fustic is the wood of Maclura tinctoria, but the tree is also called Morus tinctoria. It is a native of Brazil, Mexico, and the West Indies. Formerly this dye-wood or its extract was largely used for dyeing wool yellow, or for the yellow portion of compound colours, but, like most other vegetable dyes, its importance has declined owing to the preference now given to coal-tar colours. The name Young Fustic is occasionally given to the wood of Rhus cotinus, the twigs and leaves of which yield a yellow dye, but are much more extensively used as a tanning material. See SUMACH, DYEING.