i8o BASto\^, Lichen-Ploya of Victoria. [vof^'xxx 



21. Clathrina. Chondroid stratum of podetia outside of 



gonidial zone ; podetia variously perforated. 



Tribe id. — Stereocaule^. 

 Podetia solid, adorned with fragile granules of various 

 forms. 



22. Stereocaulon. Spores transversely divided. 



SERIES II.— THAMNOPHYLLOBLASTiE. 



Thallus fruticulose, terete, and compressed or foliaceo- 

 expanded, erect, ascending or horizontal, variously 

 affixed, never closely, and widely attached to the 

 substratum ; no podetia. 



Tribe ii. — Siphule^. 

 Thallus podetiiform or compressed, solid ; gonidia palmel- 

 laceous ; apothecia unknown. 



23. Siphula. Spores unknown. 



Tribe 12. — Thamnolie^. 

 Thallus podetiiform, fistulose ; apothecium lateral in 

 stromata. 



24. Thamnolia. Spores simple. 



Tribe 13. — Usne^. 

 Thallus cylindrical, terete or rarely angulose, solid, central 

 axis tractile, surface fibrillose ; gonidia palmellaceous ; 

 apothecia terminal, lecanorine, plano-peltilorm from 

 the beginning. 



25. Usnea. Spores simple, hyaline. 



Tribe 14. — Ramaline^. 

 Thallus cylindrical or compressed or foliaceous, erect or 

 ascending, everywhere corticate, nowhere rhiziniferous ; 

 gonidia palmellaceous : apothecia lateral or spuriously 

 terminal under deflexed apex, at first concave. 



26. Evernia. Spores simple, hyaline. 



27. Ramalina. Spores two-locular, hyaline. 



28. Theloschistcs. Spores orculiform, hyaline. 

 29 Anaptychia. Spores two-locular, fuscous. 



Tribe 15. — Gyrophore/E. 

 Thallus horizontally foliaceous, umbihcato-affixed at the 

 centre ; gonidia palmellaceous ; apothecia lecideine 

 often gyrose plicate. 



30. Gyrophora. Spores simple, hyahne. 



Tribe 16. — Heterodie.e. 

 Thallus horizontal foliaceous, affixed with rhiziucc, beneath 

 tomentose ; gonidia palmellaceous ; apothecia mar- 

 ginal, biatorine. 



31. Helerodium. Spores simple, hyaline. 



