Hyssop is the second name of Saint-John's-wort. It is a lip-flowered plant. Hyssop is usually 50-60 centimeters high. The plant is a subshrub with oblong or linear leaves or a redolent perennial herb. Flowers are usually blue, of irregular shape. They form spike-shaped blossom clusters. Hyssop grows in Asia and Russia mostly in dry places like steppes, rocky slopes and dry hills.
Hyssop in dentistry and against diseases of the mouth cavity. Hyssop decoction is used to treat inflammatory processes of the mouth cavity.