54 



THE LICHEN FLORA OF QUEENSLAND 



L\ A. glaucescens, Wilson. 



Thallus albo-glaucescent, lobato-divided , 3 inches or more in 

 width, unequal, lobes confluent or continuous, thin, circum- 

 ference white or whitish and somewhat byssaceo-crenate, 

 under surface snowy-white. Elementary filaments of thallus 

 without visible articulations, ramose, -0037 m.m. thick. 

 Gonidia irregular in shape and size, -005 — -008 m.m. in 

 W. diameter. Apothecia small, about 1 m.m. in diameter, waxy, 

 pallido-testaceous-rufous, with white indexed thalline border. 

 Spores 8 in ascus, colourless, ellipsoideo-oblong, uniseptate, 

 '007 — '01 x -003 m.m. Paraphyses thick, indistinct. 

 Hypothecium pale-fuscescent. Gel. hym. deep blue with 

 iodine. Rev. F. R. M. Wilson, in Vic. Nat,, June 1888. 



Hub. — Tambourine Mountain, by J. Shirley. 



Sub-tribe IV. — Placodei, Nyl. 



Thallus flavescent or cinerascent, areolate or granulose or 

 scabrous or pruinose, radiate or laciniate-radiate ; apothecia 

 with a thalline border (lecanorine), or rarely without one 

 (sub-biatorine) ; spores 8, ellipsoid, polari-bilocular or rarely 

 1-septate or simple, paraphyses distinct. Spermagonia im- 

 mersed, orifice coloured, spermatia shortly cylindrical, 

 slender, sterigmata articulate. 



VL— Placodjum, D. C. 



Characters as above. 



1. P. cirrochroum, Ach. f. leprosum. 



Thallus pale orange-yellow, appressed, thickly covered with 

 concolorous papillae of isidioid appearance, divisions indeter- 

 minate, radiate, areolate-diffract. Apothecia small (-9 — 1*5 

 m.m.) ; disk orange, flat or plano-convex ; margin paler 

 K. thallodal, sorediate; spores polari-bilocular, '007 — "009 x 

 •003 — -0035 m.m., colourless, with golden polar cells 

 Paraphyses separating. Hym. gel. with iodine caerulescent. 



Bab. — Mt. Perry by J. Keys ; Cabbage Tree Creek. 



