156 TASMANIAN LICHENS. 



sub-obtuse, wliitisli, opaque or sub-oj^aque, rarely dilated or 

 lobate, medulla white, dense, composed of elementary fila- 

 ments closely arrauged longitudinally. Apothecia unknown. 



1. S. torulosa, Thunb., white, compressed, smooth, ramose, 

 branches ascending, ramulose, toriilose, oftea thrust down at 

 the obtuse apices and rugose, aggregated into a bushy cushion 

 about an inch high. 



Hab. among mosses, Mount Wellington (and Brown, Cr.); 

 Ben Lomond, Bastow. 



2. S. pteruloides, Nyl., csespitose, 1 to 2 inches high, whitish, 

 opaque, ujDwards compressed and attenuate towards apex, 

 often slightly canaliculate or plicatule longitudinally on both, 

 sides, dichotomous or dichotomously ramose, one branch 

 generally the longer. 



Hab. among mosses, Mount Wellington. 



2. Thamnolia. Ach. 



Thallus consisting of podetia, which are cylindrical or sub- 

 compressed, coruute, imperforate, simple or branched, apices 

 acute, internally fistulose. Apothecia unknown. 



1. T. vermicularis, Sw., chalk white or whitish, 2 to 4 inches 

 long, prostrate or ascending or erect, simple or rarely bifur- 

 cate, smooth or longitudinally rugulose, nearly dispersed, or 

 densely stipate. 



Hab. on mossy earth or among Cladonias, especially C, 

 capitellata, in alpine places. Mount Wellington {djn.^ Brown, Cr.). 



3. UsNEA,Dill. Ach. 

 Thallus fruticulose, filamentose, erect or pendulous, fibrilloso 

 ramulose, medullary axis solid. Apothecia concolorous, orbi- 

 cular or peltate, terminal or lateral. Spores small, ellipsoid, 

 colourless, simple. 



1. U. barbata, L. Fr., albido glaucescent or pale cinereo' 

 virescent, terete, variously branched, erect or pendulous. 

 AjDothecia concolorous, rather large, fibrilloso radiate. 



Hab. on trees, logs, and old rails nearly everywhere ; Hook. 

 L. J. Bot. and Fl. Tasm.; Krplh.; Wilson ; Bastow. 



F. 1. florida, L. Fr., erect, scab rid, divergenti ramose. 

 Apothecia large, plane, pallido carneous, pruinose, with long 

 cilise on the margin. 



Hab. on trees and rails, common. Hab. Hook. L. J. Bot.; 

 Stuart, Hmpe ; Wilson. 



F.% scabrida, Tayl. (Miill. Arg.)=^. scabrida of Taylor, 

 short, branches few but covered with long fibrils. Apothecia 

 large, disk glaucous or sub-csesio albid, receptacle more or 



