Leptandra. - Synonym. - Culver's Root. The rhizome and roots of Veronica virginica Linne (nat. ord. Scrophularineae).

Habitat

United States, south to Georgia, and west to Minnesota, in low grounds.

Characters

Of horizontal growth, from 10 to 15 cm. long, and about 5 mm. thick, somewhat flattened, bent and branched, deep blackish-brown, with cup-shaped scars on the upper side, hard, of a woody fracture, with a thin, blackish bark, a hard, yellowish wood, and a large, purplish-brown, about six-rayed pith; roots thin, wrinkled, very fragile; inodorous; taste bitter and feebly acrid.

Composition

The chief constituents are - (1) Leptandrin, a bitter, crystalline glucoside. (2) A saccharine principle having the properties of Mannit. (3) Possibly a Volatile Alkaloid.

Dose, 1/4 to 1 dr.; 1. to 4. gm.

Preparations

1. Extractum Leptandrae. - Extract of Leptandra. By macer-adon and percolation with Alcohol and water, and evaporation.

Extract of Leptandra is contained in Pilulae Catharticae Vegetabiles.

Dose, 1 to 3 gr.; .06 to .20 gm.

2. Extractum Leptandrae Fluidum. - Fluid Extract of Leptandra. By maceration and percolation with Alcohol and Water, and evaporation.

Dose, 1/4 to 1 fl. dr.; 1. to 4. c.c.

Action And Uses Of Leptandra

Recent leptandra root acts as a violent cathartic, and sometimes as an emetic. It is an excellent cholagogue, appears to have a special influence upon the muciparous follicles of the intestine, and it acts very advantageously in cases of duodenal indigestion and chronic constipation.