BY JOHN SHIRLEY, B.SC. 



101 



calicaris f. fraxinea, Fr. Tuckerman says R. Yemenensis 

 and R. Ecklonii canDot be separated from R. laevigata. Fr." 



6. R. calicaris, Fries. 



Thallus whitish, glaucous grey, or chaff-coloured, rigid, 

 erect, dichotomously branched ; laciniae linear, compressed, 

 elongated, attenuated at the apices, longitudinally lacunoso- 

 canaliculate ; cortical layer tilamentose ; apothecia terminal 

 Sn. small, seated on the deflexed edges of the lacinke ; recept- 

 acle rugose beneath ; spores 8, colourless, oblong-ellipsoid, 

 straight or more generally curved, -01 12 x -0035 m.m. 

 Spermagonia occupy the ramifying venules of the laciniae as 

 small, isolated, concolorous tubercles ; sterigmata delicate^, 

 simple, straight ; spermatia acrogenous, straight. 



S*/n. — R. fraxinea v. calicaris. 



Hab. — On trees in neighbourhood of Brisbane. 



*** Thallus K — , Spores straight or usually so. 



7. R. f'arinaeea v. nervulosa, Mull. Arg. 



Thallus whitish, pale straw-coloured or glaucescent, flaccid, 

 6-9 in. long, somewhat smooth and shining, multifiid- 

 K laciniate, lacinia? branching dichotomously, linear-attenuate, 

 flat, scarious, apices very finely attenuate, canaliculate, 

 flattened margins split and turned back at intervals, the 

 cavities bearing white soredioid masses Sterile. 



Hab. — Peel Island, Moreton Bay. 



8. R. geniculata, Hook. 



Thallus smooth or nearly so, hstulose, here and there per- 

 forated ; cortical layer filaruentose. Allied to R. pusilla in 

 its fistulose thallus, but smaller, and different in the 

 M structure of the cortex, and differently branched. Spores 

 straight. 



Given by the Rev. W. A. Leighton as the name of the 

 plant afterwards determined by Dr. Stirton as R. exiguella. 

 Reported from Queensland by F. v. M. in Vic. Nat. for 

 Sept. 1887. 



