Euon'ymus atropurpu'reus, Euonymus, Wahoo Bark, N.F. -- Celastraceae. The dried bark of the root with not more than 5 p.c. of adhering wood, nor 2 p.c. of other foreign organic matter, yielding not more than 4 p.c. acid-insoluble ash; United States, east of the Mississippi. Ornamental shrub, 1.5-4.6 M. (5-15 degrees) high; wood white; leaves oval, serrate; flowers dark purple cymes; fruit smooth, 4-lobed crimson capsule. Bark, usually transversely curved pieces, occasionally single quills 2-7 Cm. (4/5-3') long, bark 1-4 Mm. (1/25-1-6') thick, light weight, grayish, wrinkled, soft scaly cork, transverse lenticels (fissures); inner surface grayish-white, striate and porous, fracture short with silky fibers of caoutchouc-like substance; odor distince; taste bitter, acrid. Powder, light brown -- starch grains, cork, secretion cells, starch-bearing parenchyma, calcium oxalate rosettes, but no prisms; solvents: hot water, diluted alcohol; contains euonymin, volatile oil 1.3 p.c., resins, atropurpurin, fixed oil, bitter extractive. Laxative, diuretic, tonic, antiperiodic, expectorant; constipation, torpid liver, dropsy, pulmonary affections; overdoses -- gastro-intestinal irritant. Owing to its uncertain and irregular absorption, hence toxic (cumulative) action, physicians should watch its tolerance and thereby regulate its dosage. Dose, 3ss-1 (2-4 Gm.); 1. Extractum Euonymi (diluted alcohol), dose gr. 1-6 (.06-.4 Gm.); 2. Fluidextractum Euonymi (diluted alcohol), dose 3ss-1 (2-4 cc.). Decoction, 5 p.c. Infusion, 5 p.c. each, 3j-2 (30-60 cc.); euonymin ("Eclectic"), root-bark -- brownish; stem-bark -- greenish, gr. 1/2-3-6 (.03-.2-.4 Gm.). E. America'nus, Strawberry Bush, low or trailing, with crimson capsules. E. Europae'us, common Spindletree of hedges, 2.5-6 M. (8-20 degrees) high, cultivated, flowers greenish-yellow, capsules pale red, arillus orange-red; emetic, purgative. Both poisonous to cattle.