THE LICHEN FLORA OF QUEENSLAND, 



Hab — Common on rocks and trees. 



P. tiliacea, Ach. 



Thallus orbicular, greenish, or grey-glaucous, membranace- 

 ous, smooth oriugulose, subpruinose. strongly adnate, lobed 

 and sinuate, lacinias closely contiguous, crenate, central 

 portions often granular and soredioid : beneath brown-black 

 and shaggy, but rufescent at the margins. Apothecia dark- 

 brown or bright-brown ; margins entire or obsolete, or in 

 younger forms crenate, incurred. Spores 8, colourless, 

 oblong, simple, -007 — -Oil x -OOo — -007 m.m. 



Syn. — P. scortea, Ach. P. endoleura, Tayl. P. galbina, 

 Ach. P. texnna, Tuck. (Kyi. Syn. Lich. p. 883. Yol. I.) 



Hab. — On twigs and small branches near Brisbane. 



P. tiliacea, Ach. v. meizospora. 



Thallus orbicul ir, light-grey, drying witli a faint yellow tinge. 



Apothecia red or red-brown, disk large, margin thick in 

 . young forms, in mature fruits with flattened upper edge. 



Spores simply ellipsoid, with thin coat, hyaline, *017 x "01 



m.m. 



Like P. tiliacea but spores of double the typical dimensions. 

 Hab. — On branches of trees, Rosewood. 



P. re vol ut a, Flh 



Thallus albo-glaucescent or whitish, margins recurved, 

 1 acini ate-1 obate, imbricate-indeterminate, crenulate-revolute, 

 sorediferous decay spreading from margins ; beneath black, 

 here and there witli sparse, small, concolorous rhizinae. 



• Apothecia medial, dark-red, receptacle smooth, margin 

 entire. Spores oblong-oval or sub-sphcrical, colourless, 

 simple, margined in maturity, variable somewhat as to form 

 and size, "007 — nil x -006 m.m. Thecal 8-spored, blue 

 with iodine, '05 x '015 m.m. Paraphyses delicate, indistinct, 

 agglutinated at their tips, which become yellow under 

 iodine. Hym. gel. blue with iodine. Spermagonia abundant, 

 scattered among the apothecia, minutely sub-papilheform, 

 ostiole black or brownish-black, body brownishdjlack, im- 



