Graphis] i. discolichenes (Wainio). 437 



.5. Gr. Ambrizensis Wain., sp. n. 



Thallus tenuis, continuus, opacus, sat lajvigatus, albidus, KHO 

 lutescens et demum rubescens, hypothallo obscurato partim 

 limitatus. Apothecia approximata, elongata, long. circ. 6 ad 2 

 mm., latit. circ. 0'4 ad 0'3 mm., simplicia aut parcius ramosa, 

 vulgo curvata aut flexuosa, demum leviter elevata, basi abrupta 

 aut constricta. Perithecium latere fuligineum, basi albidum, 

 labiis conniventibus, demum passim anguste hiantibus, superne 

 denudatis, inferne amphithecio thallino obductis. Discus rimse- 

 formis aut demum leviter dilatatus, nigricans, nudus. Hymenium 

 jodo non reagens. Epithecium fuscescens. SporEe solitarise, 

 murales, decolores, jodo violascentes, long. 0'054 ad 0"065, crass. 

 0-014 ad Q'016 mm. Comparabilis cum Gr. subcontoi-ta MUll. 

 Arg., Lich. Parag. p. 24, quse sporis majoribus diifert. 



Ambriz. — Ad corticem arboris Encumbi (i.e. Calesiam aiitiscorbutiea). 

 No. 392. 



6. Gr. obtecta (Nyl.) Wain. Nyl., Lich, Nov.-Gran. ed. 2, p. 368 

 (excl. var.), Fl. 1869, p. 72 (pro parte). 



Graphiiia obtecta Miill. Arg., Lich. Afr. Occ. (Linnsea 1880), 

 p. 37 ; Lich. Beitr. n. 474. 



Ad cortices secus flumen Quillu leg. Pechuel-Loesche teste Miill. 

 Arg., Lich. Afr. Occ. p. 37. 



Ins. Principis. — Ad truncos arborum. No. 369. 



7. Gr. subnitida Nyl. in Leight. Lich. Amaz. p. 453; Nyl., 

 Lich. Guin. p. 49 ; Wain., Lich. Antill. p. 25. 



GoLUNGO Ai>TO. — Ad corticem arboris Zanthoxylaceee in Alta 

 Queta. No. 356 pr. p. Sporse Snse, decolores aut dilutissime palles- 

 centes, jodo non reagentes, septis transversalibus circ. 10, cellnlis sat 

 numerosis, long. 0-025, crass. 0-012 mm. 



8. Gr. sorediella (Miill. Arg.) Wain. 



G'i'apAmaso>-ec^ieZfoMiill.Arg.,Lich.Afr.Occ. (Linn£eal880),p. 38. 

 Corticola in planitie depressa secus flumen Quillu a Pechuel- 

 Loesche lecta. 



9. Gr. straminea Wain., sp. n. 



Thallus crassitudine mediocris, continuus, leviter subgi-anuloso- 

 insequalis, opacus, stramineus aut rarius testaceo- vel ochraceo- 

 stramineus, neque KHO, nee Ca CI2O2 distincte reagens. Apothecia 

 oblonga aut ditformia, long. circ. 2-5 ad 0'7, latit. 0-7 ad 0-6 mm., 

 leviter elevata. Discus planus, stramineo-pruinosus aut demum 

 denudatus nigr-ifcansque, amphithecio thallino perithecium tenue 

 obducente, leviter elevato, basi constiicto, labiis hiantibus, crassi- 

 tudine mediocribus instrvicto cinctus. Perithecium laterale et 

 basale tenue, f usco-rufescens aut pallidum. Epithecium pallidum 

 aut flavescens. Hymenium jodo non reagens. Sporas solitarise, 

 murales, cellulis numerosissimis, decolores, jodo violascentes, long, 

 circ. 0-110 ad 0-150, crass. 0-025 ad 0-040 mm. Amphitheeium 

 intus jodo caerulescens. Medulla thalli jodo non reagens. 



Var. flavida Wain. Thallus stramineus. 



vol.. II. 29 



