180 THE LICHEN FLORA OF QUEENSLAND, 



Buellia. — Spores 2-locular, brown. 



44. L. exilis, Krph. 



Closely approaches L. stellulata, Mitdd., and only differs in 

 the smaller exceedingly discrete thalline areola?, and the 

 smaller and more convex apothecia, which when dry are 

 M. concave. Epithecium brown ; hypothecium above hyaline, 

 below deep brown ; spores -012 — -Oil x -006 — -007 m.m. 



Hab. — On dried earth, near Rockhampton. 



Lich. Beit., Dr. J, Muller, XXV., 6. 



45. L. stellulata, Tayl. 



Thallus very thin, white or ashy, very minutely areolate or 

 granulose, (areola? sub-convex,) central parts of thallus 

 extensively diffracto-areolate, bordered by a thin black 

 hypothalline zone. Apothecia small, to *35 m.m. ; sub- 

 innate, urceolate, confluent, black, flat, thinly margined, th e 

 K. margin often broken up by granules ; spores in club-shaped 

 asci, brown, 1-septate, oblong-ellipsoid, -009 — "012 x -005 — 

 •007 m m. ; hypothecium black-brown. 



Syn. — L. atro-alba v. atro-albella, Nyl., L. atro-albella, Nyl. 

 Hob. — Common on rocks. 



46. L. substellulata, C.K. 



Thallus whitish, minutely areolate, with a black hypothallus. 

 Apothecia persistently black, flat, shining, slightly raised, 

 K. twice the diameter of those of L. stellulata, margin concolor- 

 ous, persistent ; proper excipulum thick, black, rising from 

 the hypothallus ; paraphyses agglutinate, with brown tumid 

 apices ; spores ovoid, brown, *012 x # 0075 m.m. 



Hab. — Taylor's Range, on rocks, 



47. L. atro-alba, Ach. 



Thallus crustaceous or tartareous, spreading, griseo-pallescent 

 or cinereo-fuscescent, areolate-Jiffract and granular or some- 

 what mealy, areola? plano-convex. Apothecia plane, sunk to 



