104 Acta Societatis pro Fauna et Flora iennica, VII. 



sunt evoluta. — Medulla thalli jodo passim caerulescens, hyphis 

 0,002—0,0 02 5 millim. crassis, leptodermaticis. Gonidia protococ- 

 coidea, diam. circ. 0,0 9 — 0,0 6 millim., membrana tenui. Peri- 

 ihecium albidum, in latere tenuissimum cvanescensque, amphi- 

 thecio thallino obductum. Hypothecium albidum, tenue aut sat 

 tenue. Hymenium circ. 0,ioo millim. crassum, jodo levissime 

 caerulescens (asci distinctius colorantur). Paraphyses 0,ooi5 

 millim. crassae, apice haud incrassatae, sed granulis et ramulis 

 minutissimis pruinam formantibus instructae, ceterum neque ra- 

 mosae nee connexae, laxe cohaerentes. Asci clavati, circ. 0,oio 

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

 leviter flexuosae, apicibus attenuatis, primum 3-septatis, loculis 

 cylindricis. 



Trib. 4. Pertusarieae. 



Thallus crustaceus. Stratum corticate haud evolutum aut 

 cartilagineum. Stratum medullare stuppeum, hyphis leptoderma- 

 ticis aut membranis leviter incrassatis. Gonidia in zona supra 

 stratum medullare disposita. Apothecia lecanorina aut hymenia 

 plura in eodem excipulo vel pseudostromate continentia, aut thallo 

 immersa, disco punctiformi aut dilatato. Excipulum vel pseudo- 

 stroma nullum distinctum aut verrucam thallinam strato medullari 

 stuppeo instructam formans. Paraphyses bene evolutae, ramoso- 

 c©nnexae. Sporae magnae aut majusculae crassaeque, simplices 

 aut 1-septatae (Var ice 11 aria), membrana incrassata, decolorc 



1. Pertusaria. 



I). C, Fl. Fr. II (1805) p. 319; Fr., Lich. Eur. Ref. (1831) p. 417: 

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

 tab. 11 fig. 1—10; Koerb., Syst. Germ. (1855) p. 381; Th. Fr., Gen. Hetero- 

 licli. (1861) p. 105, Lich. Scand. (1871) p. 303; Tuck., Gen. Lich. (1872 p. 

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

 (1882) p. 24; Mull. 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. Franc. (1890). 



TJiallus crustaceus, uniformis, interdum hypophloeodes, rhi- 

 zinis nullis, hypothallo et hyphis medullaribus substrato affixus, 

 srato corticali nullo aut superne thallum obdueeiile. chondroideo, 



