_ XXIX _ 

 CLAVIS 



LICHENUM, 

 Generumque Conspectus, 



1. STEREOTHALAMI a). 



Apothecium nullum. 



Propogula nuda, sparsa vel aggregata. 



Genus 1. Pulveraria. Propagula pulverulen- 

 ta pulvinato-conglomerata , filis tenu- 

 issimis cohaerentia & intertexta. 

 (Thallus nullus). 



2. Lepraria. Propagula subglobosa ia 



subiculo crustaceo sparsa, libera, su- 

 perficialia, eumque saepe obtcgentia. 

 (Thallus crustaceus effusus). 



3. SPILOMA. Propagula? difformia fioc- 



coso-puiverac^a rigida, in Pidvinulis 

 planis maculiformibus superficiaiibus 

 affixa. 



(Thallus crustaceus eifusus). 



4. Variolaria. Propagula globosa in 



Sorediis propriis aggregata. 

 (Thallus crustaceus plerumque de« 

 terminatus. 



11. mv 



a) a ffTffaw, privo, orbo, 8c SttActytc?. 



