Quercus Marina five fucus vesiculofus: Fucus maritimus five quercus maritima vesiculas habeas C. B. Fucus vesiculofus Linn. Sea wrack. or Sea oak: a soft, very slippery, marine plant; common upon rocks that are left dry at the ebb tide; with the leaves somewhat resem-bling in shape those of the oak tree; the stalks running along the middle of the leaves, and terminated by warty bladders containing either air or a slippery fluid. The vesicles begin in March to fill with a thin juice; and about the end of July they burst, and discharge a matter as thick as honey.

Dr. Russel relates, that he found this plant an useful assistant to sea water in the cure of di-sorders of the glands: that he gave it in powder to the quantity of a dram, and that in large doses it nauseated the stomach: that by burning in the open air it was reduced into a black saline powder, which seemed, as an internal medicine, greatly to excel the officinal burnt sponge; which was used with benefit, as a dentifrice, for correcting laxities of the gums; and which shewed a notable degree of detergent virtue by its effect in cleaning the teeth: that the juice of the vesicles, after standing to putrefy, yielded, on evaporation, an acrid pungent salt, amounting to about a scruple from two spoonfuls: that the putrefied juice, applied to the skin, sinks in immediately, excites a slight sense of pungency, and deterges like a solution of soap: that one of the best applications for discussing hardness, particularly in the decline of glandular swellings, is a mixture of two pounds of the juicy vesicles, gathered in July, with a quart of sea water, kept in a glass vessel for ten or fifteen days, till the liquor comes near to the consistence of very thin honey: the parts affected are to be rubbed with the {trained liquor twice or thrice a day, and afterwards washed clean with sea water.

(a) Med. Eff. Edinb. ii. 257.

AEthiops ve-getabilis Dr. Russel.