Physcia. 141 



grosse pseudo-parenchymatico; stratum medullare excipuli solum 



in margine et infra stratum corticale gonidia continens. Hypo- 



thecium albidum. Hymenium O,iio 0,i2o raillim. crassum, jodo 



persistenter caerulescens. Epithecium fuscum (fulvo-fuscum: Miill. 



Arg., 1. c). S])orae 8:nae, distichae, elUpsoideae aut oblongae, 



apicibus obtusis aut rarius rotundatis, medio levissime constrictae, 



long. 0,022 0,015 ( 0,024: Miill. Arg., 1. c), crass. 0,oio--0,oo7 



milhm., locuhs sat parvis, plus minusve angulosis. Concej^tacula 



Ijycnoconidiorum thaho immersa, conceptaculo pahido albidove, ad 



ostiolum nigricante. Sterig77iata 0,oo2 mihim. crassa, constricte 



articulata, cehuhs ehipsoideis. Pycnoconidia oblonga, apicibus 



obtusis, recta, long. 0,oo5 O,oo3 5, crass. vix 0,ooi mihim. 



3. Ph. integrata Nvl. (emend.). Ph. dilatata "^Ph. integrata 

 NyL, Syn. Lich. (185860) p. 424 (Tuck., Syn. Is^orth Am. 1882 

 p. 75). Ph. obsessa Mont., Syh. p. 328, NyL, Syn. Lich. p. 426 

 (mus. Paris.), haud Parm. obsessa Ach. Coh. Glaziou n. 1824, 

 1916 (Ph. steharis" et aegiahta'' Kremp., FL 1876 p. 74). Ph. 

 astroidea Viypomela Tuck., Syn. North Am. (1882) p. 74 (pr. p.), 

 Wright^ Lich. Cub. n. 86 pr. p. 



Thallus superne albidus, subtus vulgo obscuratus aut rarius 

 partim pahescenS; KHO superne et intus lutescens, irregulariter 

 crebre laciniatus, laciniis adpressis, planiuscuhs, inaequaliter dila- 

 tatis cuneatisque, 1 3 mihim. latis, contiguis et passim con- 

 fluentibus, esorediatis aut rarius superne sorediosis, subtus rhizi- 

 nis brevibus sat parcis nigricantibus aut rarius passim pahidis 

 instructus. Apothecia disco fusco-nigro aut fusco-rufescente aut 

 hvido-fuscescente. Exciimlum efibrihosum. Sporae 1-septatae. 



Var. obsessa Wainio. Ph. ohsessa Mont., L c. 



Thallus esorediatus. Ad corticem arborum in silva ad 

 Sepitiba in civ. Rio de Janeiro, prope Sitio (1000 metr. s. m.), 

 n. 812, in Carassa (1400 metr.), n. 1543, in civ. Minarum, 

 Thallus albidus vel caesio- aut glaucescenti-albidus, plagas 

 1 decim. latas formans, laciniis sat tenuibus, margine irre- 

 gulariter crenatis, superne laevigatis, subtus lere usque ad mar- 

 ginem nigricantibus aut partim rufescentibus, rhizinis circ 0,3 0,5 

 mhhm. longis, simphcibus, sat increbris, centro passnn deficienti- 

 bus. Stratum corticale superius pseudo-parenchymaticum, tenue 

 (circ 0,015 mhhm. crass.), celluhs in series verticales dispositis, 

 locuhs 0,0 5 0,0 7 milhm. latis. Stratum corticale inferius 



