This section is from the book "An Experimental History Of The Materia Medica", by William Lewis.
Erysimum vulgare C. B. Iriofive eryfimum diofcoridis Lob. Eryfimum officinale Linn. Hedge-mustard: a hairy plant, with oblong narrow leaves, divided into wing-like sections, triangular at the extremity; and tough, branched stalks, bearing numerous small, yellow, tetra-petalous flowers, which are followed by short roundish pods, standing close to the stalks, full of small reddish brownish seeds. It is annual, common in waste places, and flowers in July.
The leaves of erysimum are said to be atte-nuant, expectorant, and diuretic; and sland particularly recommended against chronical coughs, and hoarseness, whether humoural, or occafion-ed by immoderate exertion of the voice. Lobel greatly commends for this purpose a compound syrup, which, as Geoffroy observes, is not su-periour to a simple mixture of the expressed juice of the herb with honey; and indeed it is not very clear whether the virtue of the honey is much improved by the erysimum. The herb has no smell, and its taste, at lead when moderately dried, is little other than herbaceous, with somewhat of a flight saline impregnation.
The seeds of erysimum are considerably pungent, and appear to be nearly of the same quality with thole of mustard, but weaker. Their acrimony, like that of mustard-seed, is extracted totally by water, and partially by rectisied spirit, and slrongly impregnates water in distillation.