Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 281 



cyanescentibus, esorediatis, medulla alba, jodo caerulescente, 



hypothallo nigro. Apothecia nigra, nuda, disco piano, margine 



tenui aut sat tenui. Sporae 8:nae, maturae nigrae muralesque, 



cellulis baud numerosis. 



Distr. Supra rupes et lapides saxaque, praesertim 



granitica, locis apricis frequenter toto territorio, etiam in 



omnibus regionibus Lapponiae (Norrl. Ber. Torn. Lappm. 



p. 341, Vain. Adj. Lich. Lapp. II p. 133, Nyl. Lich. Lapp. Or. 



p. 166). 



Thallus modice incrassatus aut sat tenuis aut raro partitn 

 crassus aut evanescens, vulgo areolatus, areolis contiguis aut 

 dispersis, aut raro continuus et leviter rimosus, baud sorediosus, 

 nee KHO, nee CaClaOs reagens, acidum rhizocarpicum et psoromi- 

 cum (sec. Hesse Journ. Prakt. Chem. 58, 1899, p. 626, et Zopf 

 Flechtenst., 1907, p. 402) et interdum barbatinum sive rhizoni- 

 cum (sec. Hesse 1. c. p. 427, et 1. c. 68, 1903, p. 14, conf. Zopf 1. c. 

 p. 238, 402) continens. Apothecia baud aut parum prominentia, lat. 

 circ. 1- — 0.5 mm, hypothallo aut strato gonidioso imposita. Peri- 

 thecium ex hyphis radiantibus, sat leptodermaticis, conglutinatis, 

 formatum, cavitatibus ellipsoideis oblongisve, O.oos mm latis, intus 

 partim subalbidum, extus rubricoso-fuscofuligineum, KHO demum 

 leviter rubricosum. Hypothecium fuscofuligineum, KHO demum 

 leviter rubricosum aut parum reagens, ex hyphis erectis, sat 

 leptodermaticis, conglutinatis, formatum. Hymenium circ. 0.i50 — 

 0.180 mm crassum, jodo persistenter caerulescens. Epithecium 

 sordide aeruginoso-nigricans (f. epichlorotica) aut olivaceum palli- 

 dumve (Vain. Lich. Exp. Vegae Pitlekai p. 110) aut vulgo fusco- 

 vel rubricoso-fuligineum et KHO violaceo-purpureum. Paraphyses 

 gelatinam baud abundantem, in KHO demum turgescentem, e strato 

 exteriore membranae verisimiliter formatam, percurrentes, ramoso- 

 connexae, sat crebre septatae, crass. O.002 mm, apice 0. 0025 — 0. 004 

 ( — 0.005) mm, membrana tenui, distincta. Sporae typice 8:nae, 

 abortu saepe pauciores, primum 3 — 4-septatae, demum murales, 

 cellulis baud numerosis, strato gelatinoso tenuiore crassioreve 

 decolorato praesertim primum indutae, long. circ. O.024 — O.035, crass. 

 O.ou — 0.014 mm (halone non computato), sec. Hepp Flecht. Eur. 

 n. 152 long. „ — O.oso mm", Conidangia „minutissima, subverrucae- 

 formia, semiimmersa, nigra, solitaria aut aggregata aut interdum 

 confluentia, praesertim ambitum versus thalli disposita aut pone 

 marginem areolarum" (sec. Mudd Man. Brit. Lich. p. 221). Ste- 

 rigmata simplicia (sec. Linds. 1. c. p. 270) aut parum septata 

 (sec. Flagey Fl. Lich. Franche-Comte p. 493). Conidia cylindrica. 



