32 



A. ZAHLBRUCKNER, DIE FLECHTEN. 



Lecanora (sect. Eulecanora) subelata A. Zahlbr. nov. spec. 



Thallus epilithicus, crustaceus, uniformis, tartareus, 0,4 — 1 mm crassus, piagas 

 plus minus rotundatas et sat amplas formans, ochroleucus, opacus, KHO flavens, 

 demum fuscatus, CaCl 2 0 2 erythrinosus, areolato-rimosus, areolis angulosis, usque 

 2 mm latis, planis, in superficie parum laevigatis et passim parum inaequalibus, 

 sorediis et isidiis destitutus, in margine protothallo angusto chalybaeo-nigricanti cinc- 

 tus; Stratum corticale parum distinctum, ex hyphis intricatis et valde pulverulento- 

 inspersis formatum; medulla tartarea, alba, KHO e flavo aurantiaca, KHO + CaCl 2 0 2 

 erythrinosa, J — , ex hyphis intricato-conglutinatis et inspersis formata; gonidia Stra- 

 tum sat latum formantia, cellulis 7- — 11 \i. latis. 



Apothecia sessilia, dispersa vel plus minus approximata, nigra vel lurido-nigri- 

 cantia, usque 2 mm lata, ad basin constricta, e rotundo raox sinuato-flexuosa; discus 

 primum concaviusculus, dein planus et demum plus minus convexus; margo thallinus 

 niger, primum discum bene superans, sinuoso-flexuosus, demum depressus, in sectione 

 transversali ad ambitum anguste coeruleo-nigricans, KHO smaragdulus, intus decolor, 

 ex hyphis fiexuoso-radiantibus et eonglutinatis formatus, gonidia pallida, subseriatim 

 vel subradiatim disposita, usque ad marginem penetrantia includens; excipulum di- 

 stinctum, sed angustum, J — , decolor, ex hyphis tangentialibus, tenuissimis et eon- 

 glutinatis formatum, integrum, usque ad verticem hymenii assurgens et ibidem 

 dilute olivaeeo-aeruginascens ; hypothecium hymenio paulum angustius, fere decolor 

 vel pallide fuscescens, molle, ex hyphis intricatis formatum, in parte superiore maculas 

 rotundas, aere impletas copiosas includens; hymenium superne aeruginoso-nigricans, 

 KHO smaragdulum, NO ; , sordide roseum, caeterum decolor, 150 — 165 [j. altum, gut- 

 tulatum, superne passim epithecio pulverulento, olivaeeo-fusco tectum, J violaceo- 

 coeruleum; paraphyses densae, capillares, simplices, eseptatae, ad apicem vix latiores, 

 conglutinatae; asci hymenio subaequilongi, ovali- vel oblongo-clavati, ad apicem 

 rotundati, 8-spori; sporae in ascis 2 — 3-seriales, decolores, simplices, ellipsoideo- 

 oblongae vel oblongae, utrinque rotundatae, membrana tenui et laevi cinetae, 11 — 

 14 [j. longae et 3,5—5 [i latae. 



Conceptacula pyenoconidiorum immersa, globosa, vertice punetiformi nigro, 

 thallum vix superantia; perifulcrium pallidum; fulcra exobasidialia; pyenoconidia 

 bacillaria, utrinque retusa, recta vel subrecta, sat brevia, 10.5 — 12 jj. longa et 1,5 \>. lata. 



Falkland-Inseln: Port Stanley, auf Quarzit. 



Trotz der scheinbar lezideinischen Apothezien eine echte Lecanora, habituell 

 der vergehenden Art nahe kommend, aber von dieser sofort durch die kurzen Pyk- 

 nokonidien als verschieden erkennbar. 



Lecanora (sect. Eulecanora) atra var. lirellina A. Zahlbr. nov. comb. — As- 

 incilia lirellina Darb.! in Wiss. Ergebn. Schwedisch. Südpol. -Expedit., vol. IV, Liefrg. 

 11, 1912, p. 10, tab. II, fig. 18—19. 



Thallus crustaceus, uniformis, tartareus, crassiusculus, in centro usque 2 mm 

 altus, sublutescenti-albidus, KHO flavescens, CaCl 2 0 2 — , e subcontinue demum bene 

 areolato-diffractus, areolis planiusculis, superne tenuissime subreticulatim-impressis, 



