434 107. Borrera. 4. CENOTHALAMEA. Pl. cell. aph. 
XVII. 107. BORRERA. Acharius. Borrer. 
Thallus cartilaginous, jageed-branched ; Jags free, un- 
derneath mostly grooved, edge fringed; apothecia shield- 
like, thick, formed underneath from the thallus, podicilled: 
proligerous flake, forming the centre, coloured, inside simi- 
Jar or vesicled; ¢halloid border eievated, bent inwards, ex~ 
ceeding. 
1. Borrera ciliaris. Fringe borrer. 
Thallus greenish brown; jags linear, branched, nar- 
rowed, tips fringed; underneath whitish, grooved; apo- 
thecia nearly terminal; centre hollow, then flat, blaek 
brown and grey; thalloid border crenated and fimbriated. 
Lichenoides arboreum foliosum cinereum, scutellis nigris, foliorum ex- 
tremitatibus hispidis et pilosis, Rati Syx. 73, 07. 
Lichen ciliaris, Lin. 8. P. 1611; Engl. Bot. 1352. 
Lobaria ciliaris, Hoffm. Germ, 144, 
Parmelia ciliaris, Achar. Meth. 255, 
Borrera ciliaris, 4char. Lich, 496. 
On the trunks of trees, and on rocks. 
2. Borrera teneHa. Tender borrer. 
Thallus greyish white; both sides naked, similarly co- 
loured, rather starlike, jags pinnately cut; tips ascending, 
dilated, arched, fringed; apothecia scattered, centre flat, 
blackish grey ; ‘hallord border not in the least cut. 
Lichen hispidus, Schreb. Fl. Germ. 126. 
Lichen tenellus, Scop. Carn. 1406; Engl. Bot. 1351. 
Lobaria hispida, Hoffm. Germ. 151. 
Parmelia tenella, 4char. Meth. 250. 
Borrera tenella, Achar. Lich. 493. 
On the trunks and branches of trees, and on palings. 
3. Borrera leucomela. Pied borrer. 
_Thallus palish ; jags upright, lineay, many-cut, narrowed, 
fringed; underneath very white, rather powdery, slightly 
grooved; centre of the apothecia flat, black grey; thalloid 
lorder fringed. 
Lichen comosus, Bory Foy. 
Lichen leucomelas, Lin. 8S. P. 1613. 
Physcia leucomelos, Michaux Amer. 526. 
Parmelia leucomela, dchar. Meth. 256. 
Borrera Jeucomela, dchar. Lich. 499, 
On the trunks of trees. 
