KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 57. NIO 6. 



31 



Lecanoraceae. 



Lecanora capistrata A. Zahler, comb. nov. - Lecidea capistrata Darb.! in 

 Wiss. Ergebn. Schwedisch. Südpol. -Expedit., vol. IV, Liefrg. 11, 1912, p„ 3, tab. I, 

 fig. 2. 



Thallus crustaceus, uniformis, epilithicus, usque 1.4 mm altus vel passim tenuior, 

 tartareus, late effusus, pallide argillaceus, fere stramineus vel stramineo-cinerascens, 

 opacus, KHO flavens, CaCLO., aurantiaco-erythrinosus, areolato-rimosus, areolis par- 

 vis, 0,2 — 1 mm latis, angulosis vel plus minus elongatis, fissuris valde tenuibus 

 separatis, continuis, in superficie ruguloso-inaequalibus, planiuscnlis vel levissime con- 

 vexis, soredia et isidia non gerens, in m argine passim lineis protothallinis nigris et 

 tenuibus notatus; Stratum corticale tenue, 18 — 25 ;j< crassnm, ex hyphis intricatis, 

 dense pulverulento-inspersis formatum; gonidia Stratum angustum, subcontinuum for- 

 mantia, cystococcoidea, cellulis 7 — 9 >j. latis, globosis; medulla tartarea, alba, KHO 

 flavens, KHO + CaCl 2 0 2 aurantiaca, J — , ex hyphis intricatis et insperis formatum, 

 lacunas aeriferas includens. 



Apothecia numerosa, primum subimmersa, dein adpressa et demum sessilia, 

 approximata, usque 1.2 mm lata, rotunda vel subflexuosa, nigra, madefacta in aeru- 

 ginosum vergentia, opaca, e piano le viter convexa; margo thallinus thallo concolor, 

 valde tenuis, haud prominulus, demum depressus, fere evanescens; excipulum integ- 

 rum, ad latera hymenii ex hyphis radiantibus, valde tenuibus formatum, in ambitu 

 olivaceo-nigriscens, infra hymenium ex hyphis magis tangentialibus compositum; 

 epitliecium tenue, increbre pulverulentum: hypothecium pallidum, fere decolor, solum 

 inferne parum obscuratum, molle, in parte superiore guttulis majusculis, usque 6 ^ 

 latis, impletum; hymenium superne smaragdulo-nigrescens, KHO viridescens, N0 5 

 sordide violascenti-rubrum, caeterum decolor, non inspersum, 80 — 90 \i altum, J 

 violaceo-coeruleum; paraphyses filiformes, ad 1 \i crassae, simplices vel parce furcatae, 

 eseptatae, ad apicem leviter capitatae; asci oblongo- vel ellipsoideo-clavati, ad apicem 

 rotundati et ibidem membrana primum bene incrassata cincti, 8-spori; sporae in 

 ascis 1 — 2-seriales, decolores, simplices, oblongae vel plus minus ellipsoideae, mem- 

 brana tenui laevique cinctae, 10 — 16 \>- longae et 5.5 — 1.5 \>. latae. 



Conceptacula pycnoconidiorum tubercula minuta, 0,i — 0,25 mm lata formantia, 

 approximata, thallo fere concoloria (magis in carneum vergentia), ad verticem nigri- 

 cantia, cavitates irreguläres vel cerebriformes gerentia, fulcra exobasidialia; basidia 

 fasciculata, subfiliformia, pycnoconidiis brevioria; pycnoconiclia filiformia, utrinque 

 retusa, curvata vel arcuata, rarius hamata, 18^28 ;j. longa et ad 1 ;j. lata. 



Falkland-Inseln: Westinsel, Port Philomel, Halfway Cove, auf Sandstein; 

 Port Stanley, ebenfalls auf Sandstein. 



Ich halte die Art für eine echte Lecanora, welche in den Formenkreis der Le- 

 canora sulphurea gehört. 



