22 S. ALMQUIST, MONOGRAPHIA ARTHONIARUM SCANDINAVIZB. 
Sectio III. PACHNOLEPIA (Mass.) ALMQu. 
Syn. Pachnolepia Mass. Framm. p. 6 (1855). 
Leprantha Körs. S. L. G. p. 294; Pachnolepia p. 296. 
Thallus distinctus, -epiphleodes, sat crassus, vulgo albus vel albidus), gonidiis 
chroolepeis; apothecia pruinata, sub pruina atra (exe. Å. impolita); hymeniuim KOH 
nom tingitur (ut in fere omn. sequ.); hypothecium incolor (exc. A. byssacea); epi- 
thecwum parum evolutum (exc. A. fuliginosa); paraphyses sat distinete; sporw 4—J3- 
cellulares. — In corticibus vetustis sepissime occurrunt. 
Tenet summum ÄÅrthonmiarum gradum, et thallo et apotheciis optime evolutis. 
Affinitatem monstrat ad precedentem et ambo proxime sequentes sectiones, medi- 
antibus Å. fuliginosa et medusula. 
Obs. 1. Pachnolepia Mass., utpote tres modo species P. lobatam, P. impolitam, 
P.? Endlicheri continens, nostre sectioni minus respondet; melius quadrat Leprantha KöRrB., 
quod autem nomen, ommnino alio sensu propositum a Frotow (in Körs. »Grundr. der 
Kryptog.», 1848), hic non est admittendum. 
6. ÅA. impolita (EHrRH.) Borr. 
Syn. Lichen impolitus EHrH. Plant. Crypt. exs. 274 (1793; sp. autb. vidimus). 
Patellaria pruinata Pers. Ust. Ann. st. 7 p. 28 (1794). 
Parmelia impolita AcH. Meth. p. 160; Arth. pruinosu L. U. p. 147 tab. I f.3 (1810), 
SYM Sd 
Arthonia impolita Borr. E. B. 2692. 
Parmelia impolita Fr. L. E. p. 183 (excl. b.) 
Arth. pruinosa Mass. Ric. p. 51. 
Leprantha impolita KörB. S. L. G. p. 295, Arth. Par. p. 268. 
Arth. impolita MupDp. Man. p. 248. 
A. impolita LeicHtT. Br. Graph. p. 55, fig. 35. 
A. pruinosa NyLr. Arth. p. 90, Prodr. p. 411, Lich. Scand. p. 258. 
A. pruinosa Br. et Rostr. p. 120. 
Exs. DL. Suec. 202, Stenh. 147, Scher. 506, 507, Hepp. 535, Leight. 131, Nyl. 83 a (b vide 
infra), Zw. 149, Anzi L. rar. Etr. 51, Rab. 16 a, b, c. 
Thallus late effusus, sat crassus, albidus, gonidus chroolepeis; apothecia demum 
magna, difformia, plana, pruinosa, trita dilute fusca; hypothecvum incolor; spore 
majuscule, vulgo I-cellulares, cellulis subequalibus; hymenium J vinose rubens ple- 
rumque post ccerulescentiam, KOH non tinctum (= in sequentibus); Dspermogonia in eodem 
thallo ac apothecia plerumque non obvia» (NYL. Arth. p. 21). 
Thallus primo farinaceus albus, demum fere denudatus verrucosus lutescenti- vel 
cinerascenti-albidus, humidus lutescens; KOH leviter lutescentem, CaO,Cl; (presertim 
1) Recens in roseum verisimiliter semper vergit (ut in omnibus lichenibus gon. chroolep. preditis), quem colorem in 
herbario diu asservatus amittil. In descriptionibus sepissime hunc decoloratum statum solum respicere 
coacti fuimus, quum unam modo speciem nobis contigit vivam videre. 
