10 



THE LICHEN FLORA OF QUEENSLAND, 



marginal region, of more than one form in the same 

 individual. 



Syn. — P. reticulata, Tayl. 



Hab. — Common on rocks and trees. 



11. P. reparata, Stirton 



Thallus orbicular, whitish or glaucous, drying a pale brown, 

 lobate, lobes crisped, margins ascending ; under surface 

 black, irregularly veined. u Tolerably similar to P. perforata 

 but thallus firmer and minutely areolate-diffract, and spores 

 widely ellipsoid, -013 — 014 x -009 — "011 m.m. Spermatia 

 straight, truly cylindrical, -Oil — '014 (occasionally *015) x 

 •0007 m.m." Scot Nat., Jan. 1878. 



Sn. Dr. C. Krrght, in lit. F. M. B., says — " Closely (perhaps 

 too closely) a died to P. perforata ; both have the same 

 chemical reaction ; the minutely reticulated thallus on which 

 Dr. Stirton relies for separating them is stated by Dr. 

 Nylander to be one of the distinguishing characteristics of 

 P. perforata ; ;n to the breadth of the spores, the extreme 

 breadth given by Dr. Stirton agrees exactly with that stated 

 by Nylander, viz., *0ll m.m. May possibly be a variety 

 between P. perforata and L\ perlata." 



Hab. — Mt Mistake, on the bark of living trees. 



12. P. erubescens, Stirton. 



Thallus (drying) pallid - rufe^cent or rufescent - cervine, 

 laciniatc-lobate, lacinise rotunda te, margin crenate or crenate- 

 incised and nigro-ciliate ; beneath wholly fuscescent or 



• spadiceous, and shortly but thickly nigro-rhizinose ; medulla 

 pallid-whitish (K flavescent at length rubescent) ; apothecia 

 unknown ; spermagonifl innate, black without, spermati 3, 



Sn. truly cylindrical, straight, -008 — -01 x -0005 m.m. 



" Although closely allied to P. perforata, the differences as 

 indicate 1 above are quite sufficient to warrant a separation, 

 The coloir of the thallus S3ems nornral and not induced, 

 as we see occasionally in P. perforata, by extraneous 

 influence. The marginal cilia are much thicker and longer 



