Pseudopyrenula. 209 



Thallus crassitudine mediocris aut sat tenuis, glaucescens 

 [aut stramineo-glaucescens], nitidulus. ApotJiecia in pseudostromata 

 subrotundata vel irregulariter ellipsoidea, hemisphaerica, albida, 

 intus albida [aut e cellulis substrati parcius inclusis sordiclescentia] 

 immersa. Peritliecium globosum, fuligineum, integrum. Sporae 

 8:nae, oblongae, 3-septatae, long. 0,oi7 — 0,023, crass. 0,oo7 — 0,0 8 

 millim. 



Ad corticem arboris prope Rio de Janeiro, n. 164, 178. — 

 Thallus laevigatas, strata corticali, amorpho, semipellucido, crasso 

 instructus. Gonidia chroolepoidea, circ. 0,oos — 0,oo6 millim. crassa, 

 membrana sat tenui. Pseudostromata praecipue e strata corti- 

 cali thalli formata, in partibus inferioribus parcius cellulas sub- 

 strati continentia. Nucleus globosus, jodo non reagens. Para- 

 physes 0,ooi millim. crassae, bene ramoso-connexae. Asci sub- 

 cylindrici aut cylindrico-clavati. Sporae distichae, decolores, api- 

 cibus rotunclato-obtusis, saepe halone indutae, loculis lenticulari- 

 bus, apicalibus vulgo reliquis paullo majoribus. 



7. Ps. ochroleuca (Eschw.) Wainio. Verrucaria Escliw. in 

 Mart. Icon. Sel. (1828) tab. 8 fig. IV et III 1—6, Fl. Bras. (1833) 

 p. 135. Trypetheiium ochroleucum Nyl., Fl. 1869 p. 126; Mull. Arg., 

 Rev. Lich. Eschw. (1884) p. 7, Pyr. Cub. (1885) p. 391, Pyr. 

 Feean. (1888) p. 13. 



Thallus hypophloeodes aut substrata immixtus, macula vulgo 

 stramineo-glaucescente aut glaucescente, opaca aut nitida indicatus. 

 Apothecia aggregata et pseudostromatibus plus minusve distinctis, 

 difformibus, extus stramineo-albidis, intus (substrato) sordiclis palle- 

 scentibusve immersa. Peritliecium conoideo- vel depresso-subglo- 

 bosum (superne in collum conoideum angustatum), tenue integrum- 

 que aut basi tenuissimum deficiensve, fuligineum aut fuscescens aut 

 passim sordide pallidum. Sporae 8:nae, oblongae aut raro ovoideo- 

 oblongae, 3-septatae, long. 0,oi4— 0,027, crass. 0,008— 0,010 millim. 



Var. pallescens (Fee) Mull. Arg., Pyr. Cub. (1885) p. 392. 

 Irypethelium pallescens Fee, Mon. Tryp. (1831) p. 31, tab. 13 fig. 3. 



Pseudostromata pulvinuliformia, irregulariter rotundata ob- 

 longave aut difformia, depresso-hemisphaerica convexaque. — 

 Ad corticem arborum locis numerosis prope Rio de Janeiro et 

 Sepitiba in eadem civitate, n. 432. 



Var. effasa Mull. Arg., Pyr. Cub. (1885) p. 392 (em.). 



Pseudostromata tenuia depressaque, aut evanescentia. — 



14* 



