Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 225 



Thallus crustam usque ad 7 mm, raro 35 mm" (e Leutsu- 

 vaara in mus. Fenn.) latam, continuam aut rimosam areolatamve 

 formans aut verrucosus, saepe ambitu crenato, superficie tota aut 

 rarius tantuni partim soredioso-farinosus, citrinus aut raro fla- 

 vescens, KHO non reagens, hypothallo indistincto. Apothecia 

 rara, lat. 0.3 — l.s mm, interdum in hypothallo nascentia, sparsa 

 aut aggregata confluentiave, sat late adnata, basi leviter constricta, 

 baud pruinosa, opaca, disco piano, margine sat tenui, interdum 

 primum prominente, subpersistente. Perithecium quasi carbona- 

 ceum, textura sicut in B. flavovirescente, fusco-nigricans, KHO 

 parum reagens aut rubricoso-rufescens, H2SO4 aeruginosum. 

 Hymenium circ. O.ioo — O.iso mm crassum, resinoso-guttulosum, 

 impellucidum, jodo non reagens. Epithecium sordide aerugino- 

 sum aut aeruginoso-fuligineum, KHO rubricoso-rufescens aut 

 olivaceo-fuscescens, HNO3 sicut etiam H2SO4 pulchrius aerugino- 

 sum. Hypothecium superne partim anguste (circ. O.040 mm lat.) 

 albidum, textura sicut in B. flavovirescente, parte inferiore fusco- 

 fuligineum, KHO rubricoso-rufescens aut parum reagens, HNO3 

 sicut etiam H2SO4 aeruginosum. Paraphyses crass. O.ooi — O.ooo? 

 mm, apice ramosae et ramoso-connexae, ceterum simplices et 

 laxe cohaerentes, baud gelatinosae. Asci anguste ventricoso- 

 clavati, long. circ. O.085, crass. O.oio — O.013 mm, membrana tota 

 sat tenui aut leviter incrassata. Sporae 8:nae, polystichae, de- 

 coloratae, aciculares, rectae, apicibus acutis, long. circ. O.035 — O.054, 

 crass. 0.003 mm, apice inferiore baud caudato. Gonidia pleuro- 

 coccoidea, globosa, diam. O.008 — O.oio mm, simplicia (parce etiam 

 2 — 4-cellulosa visa), membrana tenuissima aut rarius mediocri 

 (autosporis globosis, diam. O.003 — O.004 mm). 



Var. subecrustacea (Nyl.) Vain. Lecidea citrinella f. subecrustacea 

 Nyl. in Norrl. Ber. Torn. Lappm. (1873) p. 341. 



Thallus e verrucis constans O.is — 0.4 mm latis, convexis, citrinis 

 aut subflavescentibus, plus minus farinosis, sparsis aut aggregatis, 

 parcissime evolutis, aut partim evanescens et apotheciis in hypo- 

 thallo inconspicuo substratoque incluso, verrucis citrinis destitute, 

 nascentibus. 



Distr. Ad terram nudam silaceo-arenariam in reg. alpina mentis 

 Ounastunturi in par. Enentekiainen in LKem. (J. P. Norrlin). Etiam 

 ad Engelberg in Helvetia (Vain.). 



Est analega var. griseae (Th. Fr.) L. flavovirescentis (Dicks.). 

 Epithecium obscure aeruginosum, KHO rubricoso-rufescens vel fusce- 

 scens, HNO3 pulchre aeruginosum. Hymenium circ. O.oso— O.oso mm 

 crassum, resinoso-guttulosum, impellucidum. Perithecium laterale 

 fuscofuligineum, KHO rubricoso-fuscescens, HNO3 demum aerugino- 



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