434 107. Borrera. 4. CENOTHALAMEJE. Pl.cell.aph. 
XVII. 107. BORRERA. Acharius. Borrer. 
Tkallus cartilaginous, jaggod-branched ; jags free, un- 
derneath mostly grooved, edge fringed; apolkecia shield- 
like, thick, formed underneath from the thallus, podicilled : 
proligerous flake, forming the centre, coloured, inside simi- 
lar or vesicled ; ikalloid border elevated, 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, black 
brown and grey; thalloid border crenated and fimbriated. 
Lichenoides arboreum folioswn einereum, sculellis nigris, foliorum ex- 
tern i tat i bus hispidis et pilosis. Rail Syn. 73,67. 
Lichen ciliaris, Lin. S. P. 101 1 ; Engl. Bat. 1352. 
Lobaria ciliaris, Hoffm. Germ. 144. 
Parmelia ciliaris, Achar. Meth. 255. 
Borrera ciliaris, Achar. Licit. 490. 
On the trunks of trees, and on rocks. 
2. Borrera tenella . 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 ; ihalloid border not in the least cut. 
Lichen hispidus, Schreb. FI. Germ. 126. 
Lichen tenellus, Scop. Cam. 1406; Engl. Bot. 1351. 
Lobaria hispida, Hoffm. Germ. 151. 
Parmelia tenella, Achar. 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, linear, many-cufc, narrowed, 
fringed; underneath very white, rather powdery, slightly 
grooved; centre of the apothecia flat, black grey; thalloid 
border fringed. 
Lichen comosus, Bory Voy. 
Lichen leucomelas, Lin. S. P. 1613. 
Physcia leucotnelos, Mickaux Amer. 526. 
Parmelia leucomela, Achar. Meth. 256. 
Borrera leucomela, Achar. Licit. 499. 
On the trunks of trees. 
