Physcia. 141 



grosse pseudo-parenchymatico ; stratum medullare excipuli solum 

 in margine et infra stratum corticate gonidia continens. Hypo- 

 thecium albidum. Hymenium 0,no— 0,120 millim. crassum, jodo 

 persistent er caerulescens. Epithecium fuscum (fulvo-fuscum: Milll. 

 Arg., 1. c). Sporae 8:nae, distichae, ellipsoideae aut oblongae. 

 apicibus obtusis aut rarius rotundatis, medio levissime constrictae, 

 long. 0,0 2 2—0,015 ( — 0,0 24: Mull. Arg., 1. a), crass. 0,oio— 0,oo? 

 millim., loculis sat parvis, plus minusve angulosis. Conceptacula 

 pycnoconidiorum thallo immersa, conceptaculo pallido albidove, ad 

 ostiolum nigricante. Sterigmata 0,0 2 millim. crassa, constricte 

 articulata, cellulis ellipsoideis. Pycnoconklia oblonga, apicibus 

 obtusis, recta, long. 0,oo5 — 0,0 3 5, crass, vix 0,ooi millim. 



3. Ph. integrata Nyl. (emend.). Ph. dilatata *Ph. integrata 

 Kyi., Syn. Lich. (1858—60) p. 424 (Tuck., Syn. North Am. 1882 

 p. 75). Ph. obsessa Mont., Syll. p. 328, Nyl., Syn. Lich. p. 426 

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

 1916 („Ph. stellaris" et „aegialita a Kremp., Fl. 1876 p. 74). Ph. 

 astroidea *hypomela 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 pallescens, KHO superne et intus lutescens, irregulariter 

 crebre laciniatus, laciniis adpressis, planiusculis, inaequaliter dila- 

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

 fluentibus, esorediatis aut rarius superne sorediosis, subtus rhizi- 

 nis brevibus sat parcis nigricantibus aut rarius passim pallidis 

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

 livido-fuscescente. Excipulum efibrillosum. Sporae 1-septatae. 



Yar. obsessa Wainio. Ph. obsessa Mont., 1. 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 fere usque ad mar- 

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

 millim. longis, simplicibus, sat increbris, centro passim deficienti- 

 bus. Stratum corticate superius pseudo-parenchymaticum, tenue 

 (circ. 0,oi5 millim. crass.), cellulis in series verticales dispositis, 

 loculis 0,oo5 — 0,007 millim. latis. Stratum corticate inferius 



