204 Acta Societatis pro Fauna et Flora fennica, VII. 



TJiallas squamosus aut fere foliaceus, adpressus aut adscen- 

 dens, superne strato corticali instructus, glaber, inferne strato 

 corticali destitutus aut solum evanescente instructus, hypothallo 

 maxima parte nigricante vel caeruleo-nigricante, vulgo bene evo- 

 luto crebroque vel raro minus evoluto aut interdum rhizinis (in 

 P. Mariana Mull. Arg.) nigricantibus substrato affixus. Stratum 

 corticale superias ex hyphis verticalibus parenchymatice septatis 

 conglutinatis formatum, series plures irregulariter horizontales con- 

 tinens, loculis majusculis, parietibus vulgo tenuibus. Stratum 

 medullare stuppeum, hyphis sat laxe contextis, circ. 0,002 — 0,00 3 5 

 millim. crassis, leptodermaticis, parce septatis. Gonidia nosto- 

 cacea (Bornet, Rech. Gon. Lich. p. 36), cellulis caeruleo-virescen- 

 tibus aut. glaucescentibus, moniliformi-concatenatis, filamentis ad 

 instar Polycocci glomeruloso-intricatis, in zona infra stratum 

 corticale disposita. Apothecia thallo innata, demum elevata pel- 

 tat aque, excipulo thallode basi constricto instructa. Excipulum 

 strato corticali crasso, grosse pseudoparenchymatico, strato 

 medullari gonidia continente, perithecio grosse parenchymatico 

 infra hypothecium modice evoluto. Hypothecium albidum palli- 

 dumve aut dilute rufescens. Sporae 8:nae J ), ellipsoideae oblon- 

 gaeve aut fusiformi-ellipsoideae, simplices, decolores. ,fioncepta- 

 cula pycnoconidiorum verrucas thallo obductas formantia, intus 

 pallida. Sterigmata articulata, cellulis brevibus numerosis. Pycno- 

 conidia cylindrico-oblonga, recta/' (Lands., Mem. Sperm. 1859 p. 

 256.) 



1. P. mbiginosa (Thunb.) Del. in Diet. Class. XIII (1828) 

 p. 20: Mass., Ric. Lich. Crost. (1852) p. 110; Tuck., Syn. North 

 Am. (1882) p. 119 (excl. b. conoplea) ; NyL, Syn. Lich. II (1885) 

 p. 29 (excl. v. conoplea). Lichen rubiginosus Thunb., Prodr. Fl. Cap. 

 (1794) p. 176 (hb. Ach.); Ach., Lich. Suec. Prodr. (1798) p. 99. 

 Pann. rubiginosa a. af finis (Dicks.) Koerb., Syst. Germ. (1855) p. 105. 



TJiallus irregulariter repetito-laciniatus, laciniis circ. 2—0,5 

 millim. latis, vulgo subcuneatis, ambitum versus stellatis, saltern 

 pro parte elongatis, adpressis, pallidus aut cinereo-pallescens aut 

 pallido-glaucescens, isidiis destitutus, subtus nigricans aut ambi- 

 tum versus pallescens et hypothallo caeruleo-nigricante vel cine- 

 reo-caerulescente vel partim subalbido tomentoso instructus. Apo- 



') De Pannaria polyspora Mull. Arg. vide sub Hcppia p. 216. 



