nProtiumgenus of chiefly tropical American trees having fragrant wood and yielding gum elemi
Century Dictionary and Cyclopedia
nprotiumA genus of polypetalous trees of the order Burseraceæ and tribe Bursereæ. It is characterized by a free cup-shaped four- to six-cleft calyx, a cup-like disk bearing the four to six long narrow petals, and the eight to twelve unequal erect stamens on its margin, and a globose drupe, the fleshy outside splitting into four valves and the stone consisting of from one to four bony one-seeded nutlets, at first united together but finally free. There are about 50 species, natives of the tropics of both hemispheres. They are small trees, exuding a balsamic resin, and bearing pinnate leaves toward the end of the branchlets, composed of three or more large stalked leaflets. The small slender-pedicelled flowers form branching panicles borne on long stalks. P. Guianense is the hyawa or incense-tree of British Guiana, and P. altissimum is there known as white cedar. Some of the species have formerly been classed under Icica (Aublet, 1775). They produce many valuable gum-resins, for which see elemi, acoutchi-resin, carauna, conima, and hyawa gum (under gum).
That is one reason I am so interested in this protium on which you chemists are working.