[ 6 S 3 ] 
clafs. In this branch of botany our own country- 
men Mr. Ray, Buddie, Dale, Doody, Pttiver, and 
Dr. Morifon, Sherard, Richardfon, and others, have 
diftinguifhed themfelves : and amongft foreigners 
M. Vaillant, Sig. Micheli, and the very eminent Dr. 
Haller : but, beyond all, the late learned and inde- 
fatigable profeffor at Oxford, Dr. Diilenius, has here- 
in made the moft ample difcoveries and improve- 
ments, of which his elaborate hiftory will ever re- 
main a {landing proof. 
The word lichen occurs in the writings of Diof- 
corides and Pliny ; and tho’ it may be doubtful, 
there is neverthelefs good reafon to apprehend, that 
Diofcorides meant to defer ibe under that name the 
very plant, or at lead; one of the fame genus, to 
which the commentators agreed to affix his deferip- 
tion. Since then the name has been varioufly ap- 
plied by different authors : on which account it is 
neceffary to premile, that the lichen five hepatic a 
Off. or liverwort of the {hops, does not fall under 
this generical term, as it is now formed by the three 
above-named authors. They comprehend under the 
term Lichen y and Diilenius under thofe of Ufnea r 
Coralloides , and Lichenoides , the hairy tree-mofs or 
ufnea of the {hops ; the mu feus pulmonarius y tree- 
lungwort, or oak-lungs ; the lichen terreftris cinereus , 
or affi-coloured ground liverwort ; the coralline- 
moffes - y the cup-moffes ; horned modes ; the orchel y 
or Canary-weed ; the mu feus iflandicus of Bartholine - y 
and a multitude of others found upon trees, walls, 
rocks, and ftones, in all parts of the world, and ia 
many parts thereof in very great abundance. 
Cafpar Bauhine in his Pinjx , John Bauhine, and 
our- 
