POLYBLASTI^ ScANDKAVICiE. 3 



Flecht. II. Myxom, p. 260), gonidia Verrucarkiceorum fonnas oinnino diver- 

 sas pi^œbere. Cui notœ — sive lichenes integraj planta3 sint, sive (ut vult 

 theoria Schwendeneriana) consortium algarum fungorumque — magnam vim 

 tribuei'e debemus. Ex ilia veteris Verrucar'm generis altera pars ad Ar- 

 cliUklienes nostros pertinet, familiam Verrucariaceorum (sens, strict.) consti- 

 tuens; altera ad Scleroli chênes referatur sitque familia Pyremdaceorum. 



Genus PohjUastiaruui, cujus species scandinavicas succincte exponere 

 hac vice suscepimus, ad ArcMliclienum classem pertinet. Quo modo a 

 ceteris ejusdem classis generibus distinguatur, ex hac dispositione synoptica 

 videre licet: 



A. Gonidia liymeiiialia prîeseiitiîi. 



1. Staurothele (Nokm.) Th. Fr.: sporœ muriformes, paraphyses gelatinoso- 

 diffluxœ. 



B. Gonidia hynienialia nnlla. 



a. Asci 1 — 8 spori. 

 a. Paraphyses distinct«, libera3. 



2. Microglena (Körb.) Lönnk.: spora3 muriformes. 



3. Beloniella n. gen.^ sporas pleioblastœ, aciculares. 



4. Geisleria Nitschke: sporaî tetrablastaî, fusif ormes. 



5. Thrombium (Walle.) Mass.: sporœ simplices. 



j3. Paraphyses in gelatinam diffluxas. 



6. PohjUustia (Mass.) Th. Fr.: sporte muriformes. 



7. Thelidimn Mass.: sporaj (normaliter) dy — tetrablast«. 



8. Veirucaria (Web., Pep.s.) Mass. Rich.: spora3 simplices. 



b. Asci polyspori. 



9. Tlielocarpon jSTyl.: apothecia flavicantia, paraphyses (vulgo) distinctœ. 

 10. Trimmatothele Nokm.^: apothecia carbonacea, paraphyses gelatinoso- 



diffluxas. 



' Ad hoc ijertinet Belonia incarnata Th. Fk. et GRiEWE. Ad Geisleriam sese 

 omnino habet, ut ad Segestriam Belonia. 



'•* Nomen Goniothele Nokm. Bot. Not. 1868 p. 192, me suadente, jam mutat amic. 

 NoKMAN, quum autea exstet homonymon Sy)ianihereoriim genus, a Candolleo descriptum. 



