Tamarisk, the French, or Tamarix Gallica, L. is an indigenous bushy shrub, which grows chiefly on the southern coasts of Britain ; where its beautiful white flowers appear in July. - This marine vegetable is peculiarly valuable for the mineral alkali it affords, when reduced to ashes, and which may serve as an excellent substitute for Spanish Barilla. - Bech-stein remarks, that in the southern parts of Europe the French Tamarisk attains the height of a middle - sized tree ; and, as its fine leaves resemble those of the cypress, it is often cultivated in pleasure-grounds. The Germans employ it with advantage in the process of tanning ; but the ashes procured from it contain a true Glauber's salt, an earthy sea-salt, and vitriolated tartar. In the saltpetre works on the Continent, the same ashes are employed for clarifying the mother-ley.

There is another species of this shrub, the German Tamarisk, a native of that country; and which deserves to be introduced into Britain : according to Suckow, it strikes, with the addition of green vitriol, a beautiful dark-brown dye on wool, and a very bright reddish-brown colour on silk. - Its fruits are used by dyers, as a good substitute for Aleppo-galls.