Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 235 



Thallus vulgo cinereo-albidus, verruculosus, raro par- 

 tim sorediosus. Apothecia vulgo mediocria, basi bene con- 

 stricta, vulgo demum subglobosa, primum margine saepe 

 sat crasso aut tenui, albido pallidove instructa, disco testa- 

 ceo- aut carneo-pallido aut albido-carneo, baud pruinoso. 

 Hypothecium decoloratum. Sporae vulgo oblongae obtusae- 

 que, 3-septatae (aut raro parceque 5-septatae), long. O.ois — 

 0.020 mm (aut raro longiores). 



Distr. Supra muscos putrescescentes in lateribus 

 rupium silicosarum et calcariarum, praertim ad basim, et 

 supra corticem et muscos ad basim truncorum Populi, Sorbi 

 et Salicis capreae passim suisque locis etiam sat frequenter 

 provenit, septentrionem versus rarescescens, sed locis nu- 

 merosis etiam in Lapponia collecta. 



Thallus tenuis aut sat crassus, verruculis minutis aut usque 

 ad 0.3 mm latis, crebris aut dispersis, interdum sorediosis, KHO 

 non reagens aut partim leviter flavescens, CaClaO^ no" reagens. 

 Apothecia lat. 1--0.7 (I.2— O.2) mm, saepe p. p. tuberculosa aut 

 tuberculato-confluentia, nee KHO nee CaClaOa reagentia, crebra 

 aut dispersa, raro p. p. testaceo-rufescentia. Hymenium O.oeo — 

 0.070 mm crassum, jodo leviter aut levissime caerulescens deinde- 

 que vinose rubens aut ascis apice persistenter caerulescentibus. 

 Epithecium decoloratum aut pallidum. Paraphyses sat laxe co- 

 haerentes, crass. O.0015 — O.ooi mm, apice leviter incrassatae, haud 

 gelatinosae, in KHO laxe cohaerentes. Hypothecium in parte 

 inferiore bene chondroideum, decoloratum, ex hyphis bene pachy- 

 dermaticis, irregulariter contextis, conglutinatis formatum, tubulis 

 tenuibus, in parte superiore pallidum aut subdecoloratum, hyphis 

 sat erectis, modice pachydermaticis. Perithecium chondroideum, 

 pallidum aut subdecoloratum, hyphis radiantibus, conglutinatis, 

 pachydermaticis, tubulis tenuibus, sat increbre aut sat crebre 

 septatis. Asci clavati, vulgo long. O.oto — O.oeo, crass. O.oio mm. 

 Sporae 8:nae, distichae, oblongae, rectae, apicibus rotundatis aut 

 obtusis. Gonidia micareoidea, globosa et diam. O.oos — O.004 mm 

 et p. p. ellipsoidea, vulgo glomerulosa et pariete communi gela- 

 tinoso-incrassato induta, interdum etiam bicellulosa. 



Obs. 1. F. peralbata (Nyl.) Th. Fr. Lich. Scand. II (1874) p. 370 

 {Lecidea sphaeroides f. peralbata Nyl. in Stizenb. 1. c. p. 15, Vain. Adj. 

 Lich. Lapp. II, 1883, p. 7), apotheciis minoribus, O.5— O.2 mm latis, bene 

 convexis, saepe testaceo-pallidis aut carneo-pallidis, margine tenui, fere 

 mox excluso, sporis 3-septalis, „long. O.012— O.oiv, crass. O.004— O.ooe mm" 



