I. Discolichenes 



sive 



Ascomycetes gymnocarpi cum algis symbiotice vigentes, 



Hymenium discum applanatum, dilatatum aut puncti- vel 

 rimaeformem, primum excipulo thallove inclusum et demum aut 

 jam primo denudatum, formans. 



A. Cyclocarpeae. 



Apothecia saltern primo orbicularia. Paraphyses arete aut 

 laxe conglutinatae, aeque longae, in capillitium haud continuatae. 

 Sporae ejectae mazaedium (vel massam sporalem capillitio immix- 

 tam) haud formantes. 



Trib. l. Parmelieae. 



TJiallus foliaceus aut fruticulosus filiformisve, applanatus 

 aut teres, heteromericus. Stratum corticate cartilagineum, ex hy- 

 phis sat pachydermaticis, conglutinatis, crebrius aut increbrius 

 septatis, lumine cellularum angusto instructis formatum. Stratum 

 medullar e hyphis vulgo comparate pachydermatieis, lumine cellu- 

 larum tenui. Oonidia protococcoidea, simplicia, flavovirescentia. 

 Apothecia thallo innata, demum elevata peltataque et basi excipuli 

 bene constricta. Excipulum thallodes, gonidia continens, strato 

 corticali cartilagineo, ex hyphis sat pachydermaticis, conglutina- 

 tis, lumine cellularum angusto instructis, format o, strato medullari 

 stuppeo. Paraphyses evolutae, simplices aut ramoso-connexae. 

 Sporae decolores aut raro fuscescentes, ellipsoideae aut oblongae 

 aut globosae, simplices aut raro septatae (Schizopelte Th. Fr.) 



