Gamboge n. : A concrete juice, or gum resin, produced by several species of trees in Siam, Ceylon, and Malabar. It is brought in masses, or cylindrical rolls, from Cambodia, or Cambogia, -- whence its name. The best kind is of a dense, compact texture, and of a beatiful reddish yellow. Taking internally, it is a strong and harsh cathartic and emetic.

Example:


Taxonomy
gamboge tree, resin, free encyclopedia, pigment, yellow pigment, The samples, representative, mustard yellow, evergreen trees, search, Color coordinates, Normalized, byte, tapping, species, family Guttiferae, genus Garcinia, morella.

Defination from the web:
Gamboge is most often extracted by tapping resin from various species of evergreen trees of the family Guttiferae (also known as Clusiaceae) ... Maerz and Paul A Dictionary of Color New York:1930--McGraw Hill Page 195; Color Sample of Gamboge: Page 43 Plate 10 Color Sample K6 ...