[ 66s ] 
We may here obferve by the bye, that the ufnea 
cranii humanly which thro’ the influence of fuper~ 
flition formerly obtained a place in the catalogues of 
the materia me die a , does not belong to this divilion of 
the lichens. The writers of thofe times didinguidied 
two kinds of ufnea humana , under the names of 
cruftacea and villofa. Any of the cruflaceous lichens, 
hut more properly the common grey-blue pitted 
lichenoides of Dillenius, was ufed for the former of 
thefe ; and, as Dale tells us, was held in mod 
edeem. The villofa was a fpecies of the genus of 
hypnum, Indeed it does not appear, that they were 
in thofe days very curious in determining the exadt 
kind j and doubtlefs any mofs, which happened to 
grow upon an human fkull, was fufficient for the 
purpofes defigned. 
2. Lichenes fruticulofi. 
i 
Such as confift of a tough flexible matter , formed 
into ramifications , in fome fpecies almoft fimple , 
in others refembling frnall fhrubs : in fome of the 
fpecies the branches are quite folid , in others 
tubular . 
This order comprehends the third of Dillenius’s 
genus of coralloides ; the whole cladonia of Hill ; 
the fecond, and feveral fpecies of the third order of 
Haller’s lichens ; feveral fpecies of the fifth, and the 
whole fixth, order of Micheli j and the lichenes fru- 
ticulofl of Linnaeus. 
The plants of this genus grow principally upon 
the ground on heaths, foreds, and mountainous bar- 
Vol. 50. 4 0^ ren 
