PRODROMUS FLORiE NOVO-dUANATENSIS. 337 



nigro-liniitatus ; apothecia oblonga vel linearia, epithccio de- 

 inum aperto planiusculo hiantia. Paraphyses graciles apice 

 fusco-clavato. 

 Hab. Pie de Guesta, eorticola, altit. 1200 metr. (coll. Lindig., 108). 



* 0. gracilior Nyl. — Differt apotheciis longioribus gracilio- 

 ribus (latit. cire. ,nm ,2), epithecio rimiformi. Sporse 3-septatae 

 (apice hamato-curvatse), longit. mm ,032-37, crassit. mm ,0030- 

 mm ,0035. 



Obs. — Gr. comma Eschw. , BrasiL, p. 76 (ex specimine Martiano e 

 Brasilia) pertinet ad Opegrapkam interalbicantem Nyl. (1). — 0. diplasio- 

 spora Nyl. etiam e Rio Negro in coll. Lindig.; apothecia latit. mm ,2- 

 mm ,3; sporœ incolores vel demura fuscœ, longit. O" 11 ", 025-32, crassit. 

 mm , 010-16, hypothecium incolor, iodo gelatina hymenea dilute caeru- 

 lescens (dein dilute vinose rubescens vel fulvescens). Quoque in Hibernia 

 ad Killarney (Carroll). 



PLATYGRAPHA Nyl. 



1. Platygrapha dilatâta Nyl. (Parmelia undulata Mnt., 

 Guyan., non Lecanora undulata F ée). — Sporae fusiformes 

 3-septatœ, longit. inm ,03!2-36, crassit. m,n ,0035-0 uun ,0040 (2). 



Hab. Chucuri, ad cortices arborum, altit. 1100 metr. (coll. Lindig., 

 37); Pie de Cuesta, altit. 1200 metr. (ead. coll. n° 100). 



2. Platygrapha homoeoides Nyl. — Thallus sulphureus opacus 



(1) Memoretur hic Opegrapha interalbnta Nyl. ; cui thallus alluis tenuissimus (vel 

 macula alb a indicatus) nigro-limitatus (an semper?); apothecia oblonga vel demum 

 linearia, sat parva simplicia aut furcato-divisa, epithecio planiusculo albido (Velalbo- 

 suffuso) intus albida; sporœ 8 n; '' incolores fusiformes 5 -septats, longit. mm , 018-25 

 crassit. mm .,00(j-7., in thecis confertis, paraphyses non distincts parcs, hypothecium 

 infra saltcin leviter fuscescens vel tenuiter obscuratum . Iodo gelatina hymenea vinose 

 fulvescens (praecedenle interdum cserulescentia). Ad corticem Croto/iù cascavillœ, 

 Species valde distincta striga epitheciali alba. 



(2) Conferatur Platygrapha bimarginata (Lecidea bimarginata Eschw. Brasil.. 

 p. 242), cui thallus pallido-albidus opacus rugulosus; apothecia prominula (albido- 

 suffusa vel nuda) mediocria, marginë (rcccptaculo) pallido flexuoso (inde apothecia 

 flexuoso-dill'ormia), intus obscura ; sporae fusiformes 5 -7-septatae, longit. mm , 032-40 

 crassit. mm ,0055-65, hypothecium luteo-fuscesccns; iodo gelatina hymenialis vinose 



ulvescens. In Brasilia, Rio das Cartasct Maracas (v. Martius). Al'finis videtur PL u/idu- 

 latœ Fée, sed apotheciis intus dilutioribus et sporis ditTerens. 



5 e série, Bot. T. VII. (Cahier n° 6.) 2 22 



