40 



A. ZAHLBRUCKNER, DIE FLECHTEN. 



Feuerland: im Walde an der Mündung des Rio Azopardo und am Westende 

 des Lago Fagnano, auf Baumzweigen; ferner im Walde am Rio Olivia, hier von 

 Alboff gesammelt. 



Parmelia (sect. Menegazzia) opuntioides Müll. Arg. in Mission Scientif. Cap 

 Horn, vol. V, 1889, p. 158; Wainio in Memoir. Herbier Boissier, no. 5, 1960, p. 7; 

 Darb, in Wiss. Ergebn. Schwedisch. Südpol. -Expedit., vol. IV, Liefrg. 11, 1912, p. 52. 



Thallus superne glaucescenti-stramineus vel subvirenti-stramineus, nitidulus, 

 KHO vix lutescens, CaCJ 2 0 2 — , iteratim articulato-ramosus, articulis angustis, rotun- 

 datis, oblongis vel rarius modice irregularibus, 1 — 5 ;j. longis, convexis vel subvesicu- 

 losis, fistulosis, sorediis et isidiis destitutus, laevigatus et demum leviter lacunoso- 

 inaequalis, foramine utplurimum unico in articulo, rarius foraminibus 2 — 3, rotundis, 

 0,5— 0,8 mm latis, annulo nigro, nitido et prominulo cinctis: articuli ultimi ad mar- 

 ginem gemminascentes, inferne et ad latera niger, nitidus, rhizinis omnino destitutus, 

 intestiniformi-plicatus, non perforatus; utrinque corticatus, cortice superiore chon- 

 droideo, lutescente ex h} 7 phis pachydermaticis, arcte conglutinatis, plus minus 

 perpendicularibus et parce ramosis, lumine valde angustis preditis formato, 28 — 36 ;j. 

 crasso; cortice inferiore fusco-nigricante, 24 — 60 ;j. crasso, strato valde tenui decolore 

 supertecto; medulla^ alba, KHO vix lutescens, CaCLCX, — , stuppea, ex hyphis laxis, 

 ramosis, usque 5,5 ;j. crassis, sat pachydermaticis, versus corticem decoloribus, versus 

 cavitatem thalli umbrino-f uscescentibus, parum inspersis formata; Stratum gonidiale 

 supra corticem superiorem dispositum, gonidiis pleurococcoideis, glomerulatis, glome- 

 rulis plus minus dispersis et Stratum continuum non formantibus, cellulis 7—9 ;j. latis. 



Apothecia parmelioidea, brevissime pedicellata, superficialia, 1—3 in articulo, 

 parva, usque 2,5 mm lata, dispersa vel congesta; receptaculum thallo concolor, sphinc- 

 trino-corrugatum, laevigatum, corticatum, cortice lutescente, chondroideo, 33 — 38 ;j. 

 crasso, ex hyphis subverticalibus, conglutinatis, parum distinctis, maculas minutas, 

 rotundatas vel lineares offerentibus formato, versus hymenium inflexo et ibidem 

 obscurato, medullam albam, solidam, sed laxiusculam, ex hyphis infra hymenium 

 usque 9 [x latis, caeterum ex hyphis 3,5—4 \>. crassis, leviter inspersis formata, goni- 

 diorum glomerulos paucos et infra hymenium et infra corticem dispositas includens; 

 discus fuscus, opacus, epruinosus, e concavo subplanus, linea valde tenui nigra in 

 ambitu limitatus; excipulum infra hymenium solum evolutum, angustum, decolor, ex 

 hyphis tangentialibus et tenuibus formatum, hypothecium valde angustum, vix distin- 

 guendum; hymenium 170 — 210 ;j. altum, superne fuscescens et strato tenui decolore 

 supertectum, non inspersum, gelatinoso-chondroideum, J coeruleum; paraphyses fili- 

 formes, ramosae, gelatinoso-conglutinatae, ad apicem non latiores, eseptatae, lumina 

 perangusta offerentes; asci ovales, pachydermatici, l^menio subaequilongi, bispori; 

 sporae decolores, simplices, late ovales, late ellipsoideae vel fere subglobosae, mem- 

 brana crassa, 8 — 9 jx lata cinctae, 62 — 70 \i longae et 42—52 |x latae. 



Conceptacula pycnoconidiorum gregaria, thalli lobos juveniles insidentia, minuta, 

 ad 0,i mm lata, vertice punctiformi, nigricante, nitido, vix prominula, globosa; peri- 

 fulcrium superne (sub lente visum) obscure fuscum, infra fere decolor; fulcra parmeli- 



