Quer'cus al'ba, Quercus, White (Tanner's) Oak Bark, N.F. -- The dried inner bark of the trunk and branches with not more than 2 p.c. of outer bark or wood or other foreign organic matter; N. America. Stately tree 18-25 M. (60-80 degrees) high, 1-2.5 M. (3-8 degrees) thick, branched; leaves large, 4-6-lobed, petiolate, smooth, light green, glaucous with prominent veins beneath, brownish when dry; flowers monoecious--staminate, catkins; pistillate, followed by 1-seeded ovoid fruit (nut, acorn), base in cupule. Bark, flat pieces, 2-10 Mm. (1/12-2/5') thick, light brown, rough-fibrous, fracture uneven, coarsely fibrous; odor distinct; taste strongly astringent; does not tinge saliva yellow when chewed; solvents: alcohol, water, contains tannin 6-11 p.c., oak-red, quercin, resin, fat, quercite. Astringent, tonic hemostatic, similar to tannin; diarrhea, dysentery, cholera infantum, hemoptysis, hemorrhages, leucorrhea, gonorrhea, intermittents, phthisis, relaxed parts, ulcers; gargle--prolapsed uvula, etc.; poultice--gangrene, etc.; powder--tooth powders and washes; tanning leather; wood durable, valuable. Dose, gr. 15-60 (1-4 Gm.); decoction, 5 p.c., 3ss-1 (15-30 cc.); extract, gr. 2-10 (.13-.6 Gm.); fluidextract (alcohol 50, water 40, glycerin 10), mxv-60 (1-4 cc.).