338 J. TRIANA ET J.-E. PLANCHON (W. GLANDER). 



tenuis subleprosus indeterminatus ; apothecia nigra alboglau- 

 cescenti-suffusa rotundata nonnihil difformia plana, margine 

 thallino obtuso subflexuoso (demum fere explanato), intus nigra; 

 sporae 8 n£P fusiformi-vermiculares 7-septatae, longit. mm , 032-40, 

 crassit. mm , 0040 -0 mm , 0045, paraphyses graciles, hypothecium 

 fusconigrum. Iodo gelatina hymenialis dilute cœrulescens mox 

 vinose fulvescens. 

 Hab. Pie de Cuesta, ad corticem arboris, altit. 1200 metr. (Lindig). 



Obs. — Differt a PL flaviseda thallo indeterminato, apotheciis magis 

 confertis margine minus prominulo, sporis 7-septatis. Apothecia (cum 

 margine thallino) lalit. mm ,8-l mm ,l, saepe conterta et subangulosa; 

 sporas vulgo curvulaa, epithecium non obscuratum. — Variât (var. pli- 

 cata) thallo tenuissimo flavescente, apotheciis nonnihil majoribus mar- 

 gine thallino persistente vulgo flexuoso; Tequendama, ad corticem 

 quercus (Lindig). Thecse sporis farctae supra crassit. mm ,017-2t. 



3. Platygràpha flaviseda Nyl. — Thallus flavus (vel vire- 

 scenti-sulphureus) opacus tenuis subleprosus determinatus ; 

 apothecia lecideiformia fusca glauco-pruinosa prominula plana, 

 margine thallino crassiusculo saepe (ter-quinquies) anguloso 

 cincta (cum margine, mm ,8-l mm ,2 lata); sporse 8 n;e incolores 

 fusiformes 3-septatae, longit. mm ,023-27, crassit. tnm ,0035- 

 mm , 0040, paraphyses graciles irregulares, hypothecium fuscum 

 vel fuscescens. Iodo gelatina hymenialis caerulescens, thecee 

 vinose fulvescentes. 



Hab. Rio Negro, ad corticem, altit. 1200 metr. (Lindig), socia Chio- 

 decti decussantis. 



Obs. — Maxime accedit versus PL epileuca?n, sed mox differt colore 

 flavo thalli et apotheciorum margine prominulo coloreque alio. Thecœ 

 sporis farctse crassitiem mm ,012-l^ adtingentes. 



4. Platygràpha psaroleuca Nyl. — Thallus albido-glauce- 

 scens vel albido-cinerascens opacus tenuis vel tenuissimus inde- 

 terminatus vel subdeterminatus; apothecia albo-vel albido-suf- 

 fusa prominula irregulariter rotundata plana conferta, margine 

 thallino concolore distincte flexuoso vel subanguloso cincta 

 (cum margine, mm ,5-0 mm ,8 lata), intus nigra; sporae 8 nœ aci- 

 culari-fusiformes 3-septatae, longit. mm 5 046-0 mm ,050, crassit. 



