The root of Althaea officinalis.

Characters. - In cylindrical or somewhat conical pieces, from three to six inches (7 to 15 centimetres) long, about half an inch (12 millimetres) in diameter, deeply wrinkled; deprived of the brown, corky layer and small radicles; externally white, marked with a number of circular spots, and of a somewhat hairy appearance from the loosened bast-fibres; internally whitish and fleshy. It breaks with a short, granular and mealy fracture, has a faint aromatic odour, and a sweetish, mucilaginous taste.

Preparation.

dose.

Syrupus Althaeae...........................................................................

1-4 fl. dr.

Composition. - It contains some 35 per cent. each of vegetable mucin and starch.

Uses. - It is bland and unirritating, and a useful demulcent in sore-throat, coughs, or intestinal irritation. An ointment made by boiling the cut fresh leaves with lard for half an hour, and then straining, has proved successful in palmar psoriasis after other means failed.1

Sterculiaceae, Or Byttneriaceae.

Oleum Theobromatis, B.P.; Oleum Theobromae, U.S.P.