Veron'ica virgin'ica, Leptandra, Culver's Root, N.F. -- The dried rhizome and roots with not more than 5 p.c. of stem-bases or other foreign organic matter, yielding not more than 6 p.c. of acid-insoluble ash; N. America, low grounds. Perennial herb, .6-2 M. (2-6 degrees) high, angular, smooth or downy; leaves lanceolate, serrate, 7.5-10 Cm. (3-4') long, whorls; flowers, spikes, whitish, tubular, stamens 2, exserted; fruit small, compressed capsule. Rhizome, horizontal, nearly cylindrical, branched, 4-10 Cm. (1 3/5-4') long, 4-13 Mm. (1/6-1/2') thick, grayish-brown, annulate from circular scars of bud-scales, numerous stem-scars above, coarse roots on sides and beneath; fracture tough, woody, wood and bark thin, latter, resinous, pith large, more or less hollow; roots 1-10 Cm. (2/5-4') long, .5-2 Mm. (1/50-1/12') thick, with light brown central cylinder; odor characteristic; taste very bitter, acrid. Powder, yellowish-brown -- numerous fragments with chloral hydrate T.S. -- pink or violet, starch grains, tracheae, wood-fibers, parenchyma with brownish resin often adherent to starch grains in the cells preventing separation of latter; solvents: 75 p.c. alcohol, water; contains (mostly in bark) leptandrin, resin 6 p.c., tannin, saponin, gum, volatile oil. Emeto-cathartic, cholagogue, alterative, tonic; duodenal atony, chronic constipation with insufficiency of biliary and intestinal secretions; acts violently on some persons. Dose, gr. 15-60 (1-4 Gm.); 1. Extractum Leptandrae (75 p.c. alcohol), dose, gr. 1-5 (.06-.3 Gm.); 2. Fluidextractum Leptandrae (75 p.c. alcohol), dose, mxv-60 (1-4 cc.). Tincture, 3j-2 (4-8 cc.); leptandrin (similar to podophyllin), gr. 1-5 (.06-.3 Gm.). V. officinal'is, Common Speedwell; Europe, N. America. -- Procumbent, pubescent, perennial, stem ascending, 7.5-25 Cm. (3-10') high; leaves obovate, petioled, 2-4 Cm. (4/5-1 3/5') long, serrate, grayish-green; flowers axillary racemes, wheel-shaped, 4-parted, pale blue corolla with dark blue stripes, 2 exserted stamens; contains bitter principle, tannin; plant used as alterative, diuretic (urinary, calculus disorders), diaphoretic, expectorant (skin diseases, scurvy); in infusion. Dose, gr. 30-60 (2-4 Gm.).