Botanical Description.--A shrub 3-4 meters high with hairy branches. Leaves opposite, oval, oblong, serrate, tomentose. Flowers purple, solitary, terminal. Calyx, 5 sepals. Corolla, 5 petals. Stamens 5, united in the form of a tube. Ovary sessile, with 5 many-ovuled compartments. Styles 5, united in the form of a tube which divides into 5 stigma-bearing branches. Capsule membranous, 5-angled, truncate, dehiscent at apex. Seeds albuminous, covered with filaments of cotton. Habitat.--San Mateo, La Laguna, Batangas, Iloilo. _Theobroma Cacao_, L. Nom. Vulg.--_Cacao._ Uses.--The roasted bean ground with sugar constitutes chocolate, one of the most generally used foods of the Philippines. It is very nutritious by virtue of the fat and sugar it contains, but all stomachs do not bear it well and its use is the unsuspected cause of much dyspepsia. The custom of drinking it very hot and following with a large quantity of cold water is a very common cause of dilatation of the stomach in the Philippines. The seed of the cacao contains several substances: cacao butter, albumin, theobromine, starch, glucose, gum, tartaric acid, free or combined, tannin, and mineral substances. Of these the butter and theobromine are the most important. Theobromine (C_7_H_8_N_4_O_2_) is a weak alkaloid, crystalline, slightly bitter, slightly soluble in cold water, more soluble in hot water, less soluble in alcohol and ether; stable in the air up to 100°; sublimes without decomposition at 290° in microscopic crystals of the form of rhomboid prisms ending in an octohedric point (Keller). This alkaloid is very little used in therapeutics and its physiological action is said to be analogous to that of caffeine but weaker. It is better to use the salt of the alkaloid, and that most frequently employed is the salicylate of soda and theobromine in doses of from 2 to 6 grams daily in solution or pill. Lately, however, Dr. Gram has maintained that theobromine is a powerful diuretic operating when other diuretics fail and further that this effect is produced without injuring the heart. The double salt is non-toxic, though sometimes in exceedingly weak patients it produces vertigo. Dr. Gram administers 6 grams a day in one-gram doses.