Chondroden'dron tomento'sum, Parei'ra, Parei'ra Bra'va, N.F. -- The dried root with not more than 5 p.c. of stems nor 2 p.c. of other foreign organic matter; Brazil, near Rio Janeiro, Peru. Tall woody climber; stem 1-10 Cm. (2/5-4') thick, bark rough, with elevated prominences; leaves 12.5-30 Cm. (5-12') long, ovate, cordate, petiolate, smooth above, finely woolly beneath; flowers dioecious, panicles; fruit purplish-black drupe, 6 in a bunch like grapes. Root subcylindrical, tortuous, in pieces 10-15 Cm. (4-6') long, 1-6 Cm. (2/5-2') thick, brownish, furrowed, hard, heavy, tough; internally brownish-gray, waxy luster (fresh), several successive concentric zones of fibro-vascular bundles, each 2-4 Mm. (1/12-1/6') wide, separated by zones of parenchyma and stone cells, prominent medullary rays; stems grayish, usually covered with lichens, without waxy luster; odor slight; taste bitter. Powder, dark brown--numerous starch grains, tracheae, wood-fibers, stone cells, brownish cork; bluish-black with iodine T.S.; solvents: 70 p.c. alcohol, boiling water; contains pelosine (cissampeline--identical with bebeerine, buxine, paricine), tannin, starch, gum, ash 6-11 p.c. Diuretic, tonic, laxative; cystitis, calculi, gonorrhea, leucorrhea, dropsy, rheumatism, jaundice; natively for bites of poisonous serpents (leaves to wound, vinous infusion internally). Dose, 3ss-1 (2-4 Gm.); 1. Fluidextractum Pareirae (diluted alcohol), dose, 3ss-1 (2-4 cc.). Extract, gr. 10-20 (.6-1.3 Gm.). Infusion, Decoction, each, 5 p.c., 3j-2 (30-60 cc.).
a, narrow form, with fruit; b, broad form; c, small form.