152 JOURNAL OF THE PLYMOUTH INSTITUTION. 
with water, which being innocuous and insipid has been used for 
the purpose of removing dust and particles of sand from under 
the eyelids. It is from this that it has obtained the name of 
clary or cleareye." Calamintha officinalis, common Calamint, is 
very common and very valuable. The leaves are furnished with 
numerous small glands, which secrete an aromatic volatile fluid. 
The fresh or dried plant is used for making an infusion, and 
is often combined with peppermint, balm, sage, pennyroyal, &c, 
forming a warm stomachic drink. Thymus Serpyllum, wild 
Thyme, flourishing, like the tormentil, on open places, where sheep 
flourish, is, like the tormentil, said to improve sheep and mutton ; 
probably this is a mistake. Bees, however, we do know are 
extremely fond of the fragrant flowers of the wild thyme, and 
the honey produced where it abounds is of a fine quality and 
flavour. Origanum vulgar e, common Marjoram, rather common, 
yields a volatile oil, useful, it is said, in external application in 
sprains and bruises. From Polwhele's History of Devonshire Mr. 
Briggs takes a note that the marjoram in the eighteenth century 
was produced in the South Hams in sufficient quantity to supply 
all the inhabitants with tea from it. Lamium amplexicaule, 
Henbit Dead Nettle, rather rare, has flowers which are a favourite 
resort of bees, &c. Ballota nigra, Black Horehound, very common, 
is used in London as a cattle medicine. Marrubium vulgare, 
"White Horehound, somewhat rare, is the well-known old domestic 
remedy for coughs. Melissa officinalis, common Balm, rather 
common, is hardly naturalized in this country. Mr. Briggs says 
an infusion of this herb was formerly much drunk by the 
countryfolk. 
We can hardly overlook two plants very different from each 
other botanically, but both alike in having the odour of cucum- 
bers, and as being ingredients in the famous old English drink 
called "cool tankard." One of them, Poterium sanguisorbia, Salad 
Burnet, is common. The other, Borago officinalis, common Borage, 
very rare, attains great luxuriance near beehives, the flowers 
abounding in honey. 
We cannot conclude without mentioning the fact that the haw- 
thorn, blackthorn, bullace, wild plum, wild cherry, dwarf cherry, 
wild strawberry, wild raspberry, wild pear, crab-apple, mountain 
ash — all of the Rosaceae Order, and not before mentioned — have 
economic qualities, and are present in our Flora. 
