14-4 THE LICHEN FLORA OF QUEENSLAND, 



Sn. smooth, rounded or lobed ; ostiola brownish, irregular, 

 approximating ; theca? broad, 2-spored, oiten constricted in 

 the centre ; spores 2-coated, oval-oblong, smooth within, 

 •09— -12 x-03— .04 m.m. Gonidia small. 



Hab— On bark, Bowen Park, Mt. Perry, &c. 



16. P. xanthoplaca, Mull. Arg. 



Thallus yellow, moderately thin, effuse, very rugulose, at 

 length rimose, superficially freely sored iose-ulcerate ; verruca? 

 1-5 m.m., hemispherical, with constricted base, obsoletely 

 M rotundate-gibbose, ostiola pallid, neither emergent nor de- 

 pressed ; spores 8, "045 — 05 x '025 m.m,, not costate within. 

 Hab. — On rocks Toowoomba. 

 Lich. Beit. v. Dr. J. M. XVI., 2. 



17. P. leioplacella, Nyl 



Thallus yellow-white, thinly crustaceous, very similar to P. 

 porinella, but with smaller rugose points between the verruca?, 

 which are not levigate. Theca? cylindrical, spores 8, uni- 

 Sn. seriate, spore coat thickish, not costate within, *037 x '02 

 m.m. ; paraphyses matted, not granular. 



Hab. — On bark of trees, Hocking's Nursery. 



18. P. subflavens, Mull Arg. 



Thallus flavicant ; verruca? hemispherical, apex obtuse not 

 depresso-concave, ostiola not confluent or depressed ; spores 

 costulate within. 



M Hab. — Corticolous. 



* % % Irregulares. 



Verruca? small, irregularly confluent, more or less sparingly 

 punctiform-ostiolate, ostiola not at all immerso-depressed. 



19. P. leucostigma, Mull. Arg. 



Thallus scattered over with sordid-whitish, small, punctulate, 

 mamillari-p'-ominent verruca?, glauco-cinereous, rugulose- 

 unequal, margins argillaceo-pallid, faintly bordered by a 



