Quilla'ja Sapona'ria, Quillaja, Soap (Tree) Bark, N.F. -- The dried inner bark with not more than 5 p.c. of outer bark nor 1 p.. of foreign organic matter; Chile, cult. in N. Hindustan. Tree 15-18 M. (50-60 degrees) high; leaves oval, evergreen, coriaceous; flowers white, monoecious; fruit capsule with persistent calyx, many seeded. Bark in flat pieces of variable length, 3-8 Mm. (1/8-1/3') thick, or small chips, brownish-white, often with cork patches, nearly smooth, occasional depressions, conical projections or channels; inner surface yellowish-white; fracture uneven, strongly fibrous; odor slight, taste acrid. Powder, pinkish-white, very sternutatory -- elongated calcium oxalate prisms, irregular crystal-fibers with thick lignified walls, medullary rays, stone cells, starch grains, cork cells with brownish walls; solvents: alcohol, hot water; contains saponin (quillajic acid, CHO + quillaja-sapotoxin, CHO), CHO, 9 p.c., starch, gum, sucrose, calcium oxalate and sulphate.  Stimulant, diuretic, expectorant, irritant, sternutatory, detergent, local anesthetic, antipyretic, paralyzant to heart and respiration, irritant to respiratory passages, poison to voluntary muscles; like senega; bronchitis, coryza, rhinitis, emulsifying agent, eruptions, scalp sores, fetor of feet, hair tonics, washing silks.  Dose, gr. 15-30 (1-2 Gm.); 1. Tinctura Quillajae, 20 p.c. (boiling water, then 35 p.c. alcohol); dose, 3ss-1 (2-4 cc.); 2. Liquor Picis Carbonis, 10 p.c. Fluidextract, mv-15 (.3-1 cc.).