Contractions. - Lept. Lpt.
Leptandra Virginica. Nat. ord., Scrophulariaceae.
Synonym. - Veronica V.
Fig. - Comm. Got., pl. 15, vol. v.
Black Root, Culver's Physic, Tall Speedwell.
Habitat. - Throughout the United States.
Flowering time. - July and August.
Part employed. - The root.
Characters. - A perennial plant, with a simple, straight, smooth, herbaceous stem from 2 to 5 feet in height. The leaves are whorled in fours to sevens, short, petioled, lanceolate, acuminate, finely serrate, and glaucous beneath. The flowers are white, numerous, nearly sessile, and disposed in long, terminal, and verticillate and subterminal spikes. Spikes panicled, crowded; bracts very small. Calyx four-parted. Corolla small, nearly white, with a deeply four-cleft spreading border, the lateral or lower segments narrower than the others, tubular, pubescent inside; tube of the corolla longer than its limb, and much longer than the calyx. Stamens 2, very much exserted. Capsule oblong-ovate, not notched, opening by 4 teeth at the apex, many-seeded. The root is horizontal, irregular, woody, about as thick as the finger, from 6 to 12 inches long, blackish externally, brownish internally, with many long, slender, dark fibres issuing horizontally in every direction. It has a faint odour, and a bitter, nauseous taste.
Time for collecting. - Early spring or late autumn.
Preparations. - Tincture of fresh root, corresponding in alcoholic strength with proof spirit. Trituration of dry root, or trituration of Leptandrin. Dr. Hale considers that the tincture of the fresh root most fully represents the entire plant.
Reference to Horn. Proving. - Hale's New Remedies.
Proper forms for dispensing. - φ and lx, Tincture only. 1 and upwards, Tincture, Pilules, or Globules.