DIE FLECHTEN DER JUAN FERNANDEZ'INSELN 383 



M. chrysostictum Mass. 



Mass. in Atti I. R. Istit. Venet., ser. 3, vol. V, i860, p. 245. — Lecanora 

 ehrysosticta Tayl. in London Journ. of Bot, vol. Ill, 1844, p. 642. — Heterothecium 

 Berteroanum Mont, apud Gay, Hist. Fisie. y Polit. Chile, Bot., vol. VIII, 1852, p. 

 176, tab. XII, fig. 5; Joiiow, Estud. Flora Juan Fernand., 1896, p. 201. 



Masatierra: auf Rinden (Bertero). 



*M. lopadioides A. Zahlbr. nov. spec. 



Thallus epiphyllus, crustaceus, uniformis, tenuis, 0,5-0,6 mm altus, glau- 

 cescenti albidus, nitidulus, KHO — , Ca C1 2 2 — , continuus vel fissuris sub- 

 stratum sequentibus passim interruptus, leviter inaequalis vel marginem versus 

 granuloso-inaequalis, sorediis et isidiis destitutus, passim linea tenui nigra cinctus, 

 superne strato corticali tenui, subamorpho tectus, caeterum fere homoeomericus; 

 gonidia cystococcoidea, globosa, laete viridia, 5 — 8 \). in diam. 



Apothecia sessilia, parva, usque I mm lata, rotunda, ad basin leviter 

 constricta, dispersa vel approximata; discus e concaviusculo subplanus, cinna- 

 momeo-fuscus vel rufescens, epruinosus; margo disco obscurior, superne fere 

 nigricans, tenuis, acutiusculus, prominulus et leviter inflexus; receptacu- 

 lum extus pallidum, albidum, opacum, corticatum, cortice crasso, decolore, 

 chondroideo, ex hyphis radiantibus, parum distinctis et septatis formato, pa- 

 raplectenchymatico, medullam et gonidia includens; excipulum integrum, fere 

 decolor, in latere hymenii flabellatum, ex hyphis dense conglutinatis, tangentia- 

 libus formatum; hypothecium pallidum, molle, ex hyphis intricatis formatum; 

 epithecium chondroideum, rufescens vel ochracto rufescens, KHO haud mutatum; 

 hymenium decolor, pulverulento-inspersum, I asci coerulei; paraphyses ca- 

 pillares, simplices, eseptatae, ad apicem vix crassiores, contextae; asci numerosi, 

 hymenio subaequilongi, ellipsoideo-clavati, superne rotundati et ibidem mem- 

 brana bene incrassata cincti, 8-spori; sporae decolores, ellipsoideae oblongo- 

 vel ovali-ellipsoideae, rectae, versus centrum nonnihil leviter angustatae, murali- 

 divisae, cellulis numerosis, minutis, subcubicis, membrana tenui cinctis, halone 

 non praeditae, 80—98 ;x longae et 28 — 35 [i latae. 



Pycnoconidia non visa. 



Masatierra: auf lederigen Blattern (C. und I. Skottsberg). 



Die Apotbezien besitzen einen typischen lekanorinischen Bau, obwohl sie 

 ausserlich wegen des nicht hellen Randes den Eindruck eines biatorinischen 

 Apotheziums machen. 



Parmeliaceae. 

 Parmelia (Ach.) DNotrs. 



A. Thallus subtus rhizinis omnino destitutus, pertusus P. pertusa. 



B. Thallus subtus plus minus rhizinosus. 

 a. Thallus fiavus vel stramineus. 



