DIE FLECIITEN DER JUAN EERNANDEZ'INSELN 359 



*L. cyanosarca A. Zahlbr. nov. spec. 



Thallus epilithicus, crustaceus, uniformis, crassiusculus, usque 2,5 mm 

 altus, pulvinulos leviter convexos vel plus minus deplanatos, demum confluentes 

 formans, isabellinus vel pallide ochraceo-stramineus, opacus, KHO flavens, 

 Ca C1 2 2 lateritio-ruber, sat irregulariter vel subareolatim rimosus, fissuris altis 

 et angustis vel paulum hiantibus, in centro plus minus verruculosus, ad am- 

 bitum passim subradians, breviter longitudinaiiter torulosus, bene determinatus, 

 sed linea obscuriore non cinctus, sorediis et isidiis destitutus; stratum corticale 

 superficiem thalli et latera fissurarum obducens, angustum, 30— 40 [X crassum, 

 ex hyphis intricatis et inspersis formatum; medulla alba, crassa, KHO sordide 

 flavens, Ca C1 2 2 lateritio-rubens, ex hyphis non amylaceis, inspersis et intri- 

 catis formata; stratum gonidiale infra corticem situm, sat crassum, continuum, 

 gonidiis laete viridibus, globosis vel subglobosis, usque 15 u, latis. 



Apothecia lecideina, immersa vel adpressa, sed superficiem thalli non 

 superantia, dispersa vel approximata, e rotundo subangulosa, nigra, opaca, 

 parva, usque 1 mm lata, e piano convexiuscula; margo niger, valde tenuis et 

 parum conspicuus, non prominulus; excipulum integrum, sat crassum, fusco- 

 nigrum; hypothecium tenue, pallidum; hymenium superne late aeruginoso- 

 coerulescens, N0 5 magis coeruleum, caeterum decolor, non inspersum, 120 — 

 140 jx altum, I intense coeruleum; paraphyses conglutinatae, filiformns, eseptatae, 

 ad apicem clavatae; asci hymenio subaequilongi, oblongo-clavati, ad apicem 

 rotundati et membrana paulum incrassata cincti, 8-spori; sporae in ascis bi- vel 

 triseriales, decolores, simplices, ovales vel ovali-ellipsoideae, rectae, membrana 

 tenui cinctae, 8,5 — 10 [X longae et 3,5 — 5 jx latae. 



Conceptacula pycnoconidiorum minuta, vertice convexo, nigro, nitidulo 

 thallum paulum superantia; perifulcrium dimidiatum, nigrescens; fulcra exobasi- 

 dialia; basidia subfiliformia, densa, pycnoconidiis vix longiora; pycnoconidia 

 filiformia, bacillaria, recta vel subrecta, ad apices retusa, 8— 9 [x longa et 

 1 — 1,5 jx lata. 



Masatierra: steinige, trockene Heide bei Tres Puntas (C. und I. Skotts- 

 berg). 



Masafuera: Cordon del Barril, bei 100 m (C. und I. SKOTTSBERG). 



:;: f. superfusa A. Zahlbr. nov. f. 



Apothecia tenuiter glauco- vel subsulphureo-suffusa. 



Masatierra: Portezuelo del Villagra, beim SELKIRK-Denkmal, 590 m, auf 

 Felsen (C und I. SKOTTSBERG). 



*L. leucoplaca Mull. Arg. 



Mull. Arg. in Hedwigia, vol. XXXI, 1892, p. 281. 



Thallus crustaceus, uniformis, tartareus, tenuis, lacteus vel cinerascenti- 

 albidus, opacus, KHO — , Ca C1 2 2 — , continuus, laevigatus, in margine linea 

 obscuriore non cinctus, sorediis et isidiis destitutus; hyphae medullares non 

 amylaceae. 



