Rubus. - Synonym. - Blackberry. The bark of the root of Rubus vil-losus Aiton, Rubus canadensis Linne, and Rubus trivialis Michaux (nat. ord. Rosacea).

Habitat

North America, in fields and thickets.

Characters

In thin, tough, flexible bands, outer surface blackish or blackish-gray, inner surface pale brownish, sometimes with strips of whitish, tasteless wood adhering; inodorous; taste strongly astringent, somewhat bitter.

Composition

1) Tannic Acid, 10 to 13 per cent. (2) Gallic Acid, 0.4 per cent. (3) Villosin, a bitter crystalline glucoside, soluble in Alcohol.

Preparations

1. Extractum Rubi Fluidum. - Fluid Extract of Rubus. By maceration and percolation with Glycerin, Alcohol and Water, and evaporation.

Fluid Extract of Rubus is used to make Syrupus Rubi. Dose, 1/2 to 2 fl. dr.; 2. to 8. c.c.

2. Syrupus Rubi. - Syrup of Rubus. Fluid Extract of Rubus, 250; Syrup, 750.

Dose, 1 to 2 fl. dr.; 4. to 8. c.c.

Action And Uses Of Blackberry

The preparations made from blackberry root are tonic and slightly astringent. They are used for diarrhoea; blackberry brandy is a common domestic remedy.