BY JOHN SHIRLEY, R.SC. 



41 



in its fragile thallus, in the thin pulverulent margins of the 

 lacinia?, in the smaller spores, and in the cortical stratum 

 being confusedly cellular. Thallus sometimes pale rose- 

 coloured. Nyl. Syn. Lich. p. 428, Vol. I. 



Syn. — P. Domingensis, Mnt. 



Hob. — Creeks on Waterworks-road. 



6. P. barbifera, Ay I. 



Thallus white or -whitish, linear-laciniate, laciniaj 1 m.m* 

 wide, dividing, ascending, margins on both sides bearded or 

 Sn. velvety with thy rsoid -ramose whitish or sordid cilia. Apo- 

 thecia ca?sio-pruinose, medium-sized, sub-terminal ; recep- 

 tacle sub-pedicellate, bare ; margin thinly covered with soft 

 branched'eiha ; spores -046 — -05 x '023 — *026 m.m. Nyl. 

 Syn. Lich. p. 41 G, Vol. L Differs from P. comosa in the 

 laciniae being seldom more than 1 m.m wide, in the bearded 

 (not filiate) margin, and in the larger spores. 



7. P. stellaris (K + C +). 



Thallus orbicular, stellate, pallid glaucous, naked not pruinose, 

 below of similar colour or whitish, and brownish fibrillose ; 

 in division resembling a young form of P. speciosa, laciniae 

 linear, sub-convex, separate or closely contiguous, not over- 

 lapping sub-cortically al bo-mac ula te ; extremities or lacinise 

 rotu«date-t ureal e, finely anil very sparingly filiate, central 

 parts of thallus coralloid. Apothecia numerous, disk dull- 

 K. red to dark-brown, frosted ; margin solid, ring-like, entire 

 or occasionally obsoletely arena!* te ; spores 8* 1-septate, 

 brown, oval, slightly curved, tapering to the apices, notched 

 and constricted at the septum, m i)l3 — "t>^2 x '005 — '007 

 m.m., cells nucleolate. Spermagonia as black obtuse 

 tubercles, cavity pericellular ; spermatia straight rods, 0035 

 m.m. ; sterigmata -015 m.m. simple or with few articulations, 



Syn. — Parmelia stellaris Ach, Borrera stellaris. 



Hub. — Mi lor a and Mt. Perry. 



8. P. obesa, Pers, v, ca^sio-crocata, Tuck, 



Thallus orbicular, glaucous, readily mistaken for forms of P. 



