104 Acta Societatis pro Faima et Flora fennica, YII. 



sunt cvoluta. MeduUa thalli jodo passim caerulescens, hyphis 

 0,002 0,0025 niillim. crassis, lcptodcrmaticis. Gonidia protococ- 

 coidea, diam. circ. 0,oo9 0,oo6 milHm., mcmbrana tenui. Peri- 

 thecium albidum, in latere tenuissimum cvanescensque, amphi- 

 thecio tliallino obductum. Hypotliecium albidum, tcnue aut sat 

 tenue. Hymeydum circ. 0,ioo milhm. crassum, jodo ievissime 

 caerulescens (asci distinctius colorantur). Paraj^hyses 0,ooi5 

 milhm. crassae, apice haud incrassatae, sed granulis ct ramulis 

 minutissimis pruinam formantibus instructae, ceterum neque ra- 

 mosae nec connexac, laxe cohaerentes. Asci clavati, circ. 0,oio 

 millim. crassi, membrana tenui. Sporae 4:nae, decolores, saepe 

 leviter flexuosaC; apicibus attenuatis, primum 3-septatis, locuhs 

 cylindricis. 



Trib. 4. Pertusarieae, 



Thallus crustaceus. Stratum corticale liaud evolutum aut 

 cartilagineum. Stratum medullare stuppeum, hyphis leptoderma- 

 ticis aut membranis leviter incrassatis. Gonidia in zona supra 

 stratum medullare disposita. A])othecia lecanorina aut hymenia 

 plura in eodem excipulo vel pseudostromate continentia, aut thallo 

 immersa, disco punctiformi aut dilatato. Excipulum vel ]jseudo- 

 stroma nullum distinctum aut verrucam thallinam strato medullari 

 stuppeo instructam formans. Paraphyses bene evolutae, ramoso- 

 connexae. Sporae magnae aut majusculae crassaeque, simphces 

 aut 1-septatae (Varicellaria), membrana incrassata, decolore. 



1. Pertusaria. 



D. C, Fl. Fr. II (1805) p. 319; Fr., Licli. Eiir. Ref. (1831) p. 417; 

 Mass., Ric. Lich. Crost. (1852) p. 186; Tul., Mem. Lich. (1852) p. 48, 59, 189, 

 tab. 11 fig. 110; Koerb., Syst. Germ. (1855) p. 381; Th. Fr., Gen. Hetero- 

 lich. (1861) p. 105, Lich. Scand. (1871) p. 303; Tiick., Gen. Lich. (1872) p. 

 126 pr. p., Syn. North Am. (1882) p. 211 pr. p. ; Krabbe, Entw. Flechtenap. 

 (1882) p. 24; Miill. Arg., Lich. Beitr. (Fl. 1884) n. 705; Nyl. in Hue Addend. 

 (1886) p. 117; Moller, Cult. Flecht. (1887) p. 24; Oliv., Etud. Pert. Fran^. 

 (1890) p. 9; Hue, Pert. Frang. (1890). 



TJiallus crustaceus, uniformis, interdum hypophloeodes, rhi- 

 zinis nuflis, hypothallo et hyphis medullaribus substrato affixus, 

 srato corticali nullo aut superne thallum obducente, chondroideo, 



