10 BULLETIN DE L'HERBIER BOISSIER. 



* Thallus subtus hirsutus aut villosus, elementa vestimenti non vellereo- 

 composita; gonidia omnium palmellacea (sporae ambitu brèves). 



33. Parmelia, sporse simplices, hyalinse; paraphyses conglutinatse ; 



vestimenti elementa paginée inferse discreta, raro nulla. 



34. Anzia, sporse simplices, hyalinse; elementa vestimenti crasso-pan- 



nosi paginse inferse intricato-anastomosantia. 



35. Xanthoria, sporse orculiformes, hyalinse; paraphyses liberse. 



36. Pseudophyscia, cortex longitrorsum filamentoso-cellulosus ; sporse 



transversim divisse, fuscse. 



37. Physcia, cortex minute isodiametrico-cellulosus; sporse transversim 



divisse, fuscse. 



38. Hyperphyscia, sporse parenchymatöse, fuscse. 



Tribus XX. — Psqrome^e. 



Thallus polycentrico-imbricato-squamosus v. laciniosus v. squa- 

 mosus, subhorizontalis, subtus vestitus ; gonidia palmellacea ; 

 apothecia lecanorina, basi constricta; sporse ssepe ambitu panna- 

 riaceo-asperulse. 



39. Psoroma, sporse simplices, hyalinse. 



Tribus XXI. — Pannareele. 



Thallus monocentrice radiatim laciniosus v. squamosus, sub- 

 adpressus, hypothallo cserulescente prseditus ; gonidia glomeru- 

 loso-nostochacea ; apothecia lecanorina; sporse ambitu plus mi- 

 nusve parce asperse. 



40. Pannaria, sporse simplices, hyalinse. 



Tribus XXII. — Parmelielle.e. 



Thallus, gonidia et sporse ut in Patmarieis, sed apothecia 

 biatorina. 



41. Parmeliella; apothecia novella margine prominente concava. 



42. Coccocarpia; apotheciorum margo obsoletus, discus ab origine 



planus. 



Tribus XXIII. — Phyllopsore.e. 



Thallus subimbricato-microphyllinus, squamulosus, subtus 

 varie vestitus, laxe v. laxiusculo affixus; gonidia palmellacea; 

 apothecia biatorina-lecideina. 



