543 



in hypothallo nigro confertim insulatis et dein plus minusve 

 confluentibus formatus, tenuissiraus et continuus, demum obso- 

 lete rimulosus et varie nigro-decussatus ; apothecia 7 3 mm. 

 lata et minora, adpresso-sessilia, nigra, nuda, opaca, tenuia et 

 ■semper prominenter marginata ; epithecium nigro-fuscum; lamina 

 hyalina; hypothecium pallide fuscescens v. subhy alinum ; sporae 



8-nae, biloculares, 9 — 12 \x longae et 4 , / 3 — B 1 /* P Mae, medio 

 obiter constrictae. — Habitu ad B. stellulatam MudcLaccedens, 

 sed thallus et hypothecium omnino differunt. — Saxieola in 

 Pinheyros prope Apialiy Brasiliae meridionalis : Puiggari n. 1738. 



1441. Buellia papillosa Mull. Arg. ; thallus tenuis, effusus, 

 papillulis breviter eylindricis Vis— 1 /! 2 n ™. erassis obtusis 

 ereetis e cinereo-albido fuscescentibus tenuissime isidiomorphis 

 formatus; apothecia '/ 2 — 1 mm. lata, tenuia, nigerrima, opaca, 

 plana, semper margine concolore tenui demum subruguloso 

 cincta; epithecium fusciim; lamina fuscidula; hypothecium late 

 nigro-fuscum; sporae 8-nae, 2-loculares, 15 — 17 n longae, 7—8 t u 

 latae, medio non v. tantum obsolete constrictae. — Thalli pa- 

 pillulis copiosissimis insignita et prope paraguayensem B. sub- 

 areolatam Mull. Arg. Lich. Parag. n. 130 locanda est. — Ad 

 saxa in Morro de Itambe prope Apiahy Brasiliae meridionalis: 

 Puiggari n. 2223. 



1442. Buellia, rimulosa Mull. Arg.; thallus albus, lineis 

 hypothallinis numerosis peragratus, tenuis, laevis, continuus, 

 mox crebre areolato-rimulosus (non diffractus); areolae conti- 

 guae, valde exiguae; apothecia circ. '/a tnm. lata, primum im- 

 mersa saepeque spurie thallino-marginata ; epithecium fusco- 

 nigrum ; hypothecium superne fusco-subhyalinum, inferne strato 

 crasso rufo-nigricans ; paraphyses apice valide clavatae; sporae 

 8-nae, 2-loculares, 9 — 11 /< longae, 47 6 — 5 /< latae, medio vix 

 constrictae. — Ad africanam B. leucinam Miill. Arg.. valde 

 accedit, sed apothecia minus immersa, hypothecium aliter colo- 

 ratura et thallus creberrime aliter rimulosus. — Saxieola prope 

 Apiahy, in Brasilia meridionali : Puiggari n. . 4. 



1443. Rhabdopsora Miill. Arg., thallus crustaceus, adnatus 

 supra non corticatus, e maxima parte filamentis verticalibus 

 rectis parallelis late baculiformibus articulatis viridibus (sub- 

 confervaceis) et paucis tenuioribus hyalinis formatus; apothecia 

 gymnocarpica, immersa, margine destituta y. demum circa di- 

 scum emergentia thallina spurie marginata; hymenium paraphy- 

 sibus irregularibus praeditum; sporae (in ascis 8 — 20) simpli- 



