Guaiac

Guajacum officinale, also called guaiac or pockwood, is a plant genus within the family of the zygophyllaceae. It includes up to eight tree species from the tropical and subtropical regions of America.

Guaiacum species refer to trees or shrubs that consist of very hard and resin-rich wood. Their leaves are opposite, with 4 to 28 leaflets.
The flowers of Guajacum officinale are borne singly in the leaf axils of the plant. They are blue, purple or white in color. The flower also has four or five sepals.

Guajacum offic inale is the parent plant of Guajaci lignum (Lignum Guajaci), the guaiac wood.