436 108. Physcia. 4. CENOTHALAMEAE. PI. cell, aph . 
at the tip; apothecia shieldlike, slightly membranaceous, 
formed underneath from the th.all.us, free, affixed to the 
same by the centre; proligerous flake forming the centre, 
hollow, coloured, covering the apothecia entirely above; 
inside similar, streaked, with a few cellules; thalloid border 
bent inwards. 
1. Physcia physodes. l¥r a cklike physcia. 
Thallus slightly stellate, sea-greenish white; jags tiled- 
like, sinuate, many-cut, slightly convex, bald ; tips inflated, 
ascending; underneath blackish brown, naked ; apothecia 
red, edge not cut. 
Lichenoides ceratophyllon obtusius et minus ramosnm, Rmi Syn, 76,85. 
Lichen physod-es, Lin. S, P. 1610; Engl. Boi. 126. 
Lobaria physodes, Hoffm. Germ. 150. 
Parmelia physodes, A char. Meth. 250; Lich. 492. 
On palings, trunks of trees, and rocks. 
2. Physcia diatry pa. Pierced physcia. 
Thallus slightly stellate, greenish white; jags sinuated, 
many-cut, flattish, smooth, perforated and with soredise ; 
tips inflated ; underneath wrinkled, folded, black ; inter- 
stices white ; apothecia pale red ; edge not cut. 
Lichen pertusus, Schrad. FI. Germ. 96. 
Lichen diatnypus, Achar. Prod. 1 1 6 ; Engl.Bot. 1248. 
Lobaria, terebrata, Hoffm. Germ. 151. 
Parmelia diatrypa, Achar. Meth. 251 ; Lich. 493. 
On the bark of trees. 
XIX. 109. PARMELIA. Acharius. Border-moss. 
Thallus leaflike, leatherlike, slightly membranaceous, 
flat, spread out, pressed out, round and stellately lobed or 
many-cut, jagged; underneath fibrillous; jags all equal at 
their tips; apothecia shieldlike, slightly membranaceous, 
formed underneath from the thallus, free, connected only 
by a central point; proligerous fluke forming the centre, 
hollow, coloured, covering the apothecia entirely at top ; 
inside similar, streaked, with a few cellules ; thalloid border 
bent inwards. 
1 . Parmelia glomulifera. Ballbearing border-moss. 
Thallus cartilaginous, stiff, round, livid, smooth, inter- 
spersed with blackish green pulvinuli ; underneath ocliry 
wfiite, downy ; lobes sinuately jagged,; jags angular and 
bordered ; apothecia reddish chestnut, border wrinkled. 
