Gua'rea (Sycocar'pus) Rus'byi, Cocillana, N.F. -- Meliaceae. The dried bark with not more than 5 p.c. of wood or other foreign organic matter; Bolivia -- river-bottoms. Tree resembles a large apple tree. Bark, in flat, curved pieces, variable length and width, up to 2 Cm. (4/5') in thickness, externally fissured, gray-brown, ashy gray from lichens, orange-brown where cork removed, inner surface brownish, longitudinally striate; inner bark thicker than outer; fracture coarsely splintery-fibrous, soft; odor characteristic; taste slightly astringent, peculiar, slightly nauseous. Powder, light brown -- lignified fibers, crystal-fibers, calcium oxalate prisms, medullary ray cells with brownish contents or starch grains, abundant stone cells, fragments of cork tissue; solvent: 75 p.c. alcohol; contains rusbyine, resins (2) alkaloid, fat, tannin, ash 10 p.c. (superior to ipecac), laxative, emetic, bronchitis, bronchial pneumonia, phthisis. Dose, gr. 5-20 (.3-1.3 Gm.); 1. Fluidextractum Cocillanae. Syrup, Elixir, each 10 p.c., dose, 3j-2 (4-8 cc.).