^gJ'-'J Bastow, Lichen-Flora of Victoria. l8i 



Tribe 17. — Peltigere^. 

 Thallus horizontal, broadly foliaceous, affixed with 

 rhizinae ; apothecia immarginate and plane ; spores 

 eventually fuscous, transversely divided. 



a. Apothecia adnate on lower surface of thallus. 



32. Nephromium. Thallus with glomurelose caerulescent gonidia. 



33. Nephroma. Gonidia palmellaceous. 



b. Apothecia on upper surface of thallus. 



34. PcUigera. Thallus with glomurelose caerulescent gonidia ; 



apothecia on marginal apex of lobes. 



35. Endocarpisciim. Apothecia endocarpoid. 



Tribe 18. — Parmelie^. 

 Thallus horizontal, mono-centrico foliaceous, but variously 

 and commonly profoundly divided, nearly always 

 clothed beneath ; apothecia marginal, and, at least 

 when young, lecanorine and concave. 



a. Thallus villous- tomentose beneath, commonly 

 bearing cyphellse or pseudo-cyphellae ; spores 

 fusiform, transversely divided, from hyaline 

 at length fuscous. 



36. Stidina. Thallus gonimic ; granules blue-green, without 



cellular membrane. 



37. Sticta. Thallus gonidic ; granules green or yellow, with 



cellular membrane. 



h. Thallus hirsute or villose beneath ; gonidia pal- 

 mellaceous : spores ellipsoid. 



38. Parmelia. Spores simple, hyaline ; paraphyses conglutinate, 



elements clothing under surface discrete, rarely none. 



39. Anzia. Spores simple, hyahne ; elements clothing under 



surface anastomosing and forming spongy masses. 



40. Zanthoria. Spores orcuhform, hyaline ; paraphyses free. 



41. Physcia. Cortex minutely iso-diametrico cellulose ; spores 



transversely divided, fuscous. 



Tribe 19. — Pyxine.e. 

 Thallus horizontal mono-centrico foliaceous, deei)ly divided, 

 clothed beneath with short rhizinae ; apothecia black, 

 lecideine. 



42. Pyxine. Spores transversely divided, fuscous. 



Tribe 20. — Psorome^. 

 Thallus polycentrico-squamose or laciniose, or squamose, 

 sub-horizontal, clothed beneath ; gonidia palmel- 

 laceous ; apothecia lecanorine, constricted at the base ; 

 spores often somewhat rough in the outline. 



43. Psoroma. Spores simple, hyaline. 



