Fraxinus america'na, Fraxinum, White Ash Bark. -- United States; tree 18-24 M. (60-80 degrees) high, durable, tough wood, 5-9 ovate, acuminate leaflets, terete fruit, 2.5-5 Cm. (1-2') long, abruptly dilated into wedge-linear wing. Dried bark, deprived of corky layer--in flat pieces of varying length, 3-6 Mm. (1/8-1/4') thick, yellowish, warty, inside pale brown, striate, fracture uneven, fibrous; odor faintly aromatic, taste bitter, acrid; contains volatile oil, resin, tannin, alkaloid (?), ash 10 p.c. Diuretic, diaphoretic, purgative; gout, rheumatism, intermittents. Dose, gr. 30-60 (2-4 Gm.); infusion, 5 p.c., 3ss-1 (15-30 cc.).