Urceolaria. 75 



septis transversalibus 5—4 et septis longitudinalibus paucis (1 — 2), 

 fusco-nigrae, long. 0,0 2 4 — 0,0 16, crass. 0,on — 0,oos millim. 



3. U. Chloroleuca Tuck., Obs. Lich. (1864) p. 268, Syn. 

 North Am. II (1888) p. 150 (Wright, Lich. Cub. n. 123: mus. 

 Paris.). 



Thallus crassitudine mediocris, subcontinuus, verrucoso-inae- 

 qualis, caesio-glaucescenti-albidus, esorediatus, neque I, nee KHO,. 

 nee Ga Cl 2 2 reagens, KHO (Ga Cl 2 2 ) rubescens. Apothecia 

 demum aperta planaque, margine sat tenui, subintegro. Exci- 

 pulum proprium fusco-fuligineum. 



Supra cementum prope Rio de Janeiro, n. 38. Hanc spe- 

 ciem exactius non descripsimus, quia specimen nostrum haud 

 est satis bene evolutum. Thallus KHO (Ga Gl 2 2 ) rubescens. 

 Apothecia thallo immersa. 



Trib. 16. Thelotremeae. 



Thallus crustaceus, homoemericus aut heteromericus. Stra- 

 tum corticale haud evolutum aut tenue amorphumque. Stratum 

 medullare stuppeum, to turn gonidia continens aut parte inferiore 

 gonidiis destitutum, hyphis leptodermaticis. Gonidia chroolepoi- 

 dea (Trentepohliae umbrinae Bornet similia). Apothecia thallo 

 innata, immersa permanentia aut demum emergentia et verrucas 

 formantia (aut raro margine repetito-prolifera: Poly stroma 

 Clem. l ), orbicularia aut raro oblonga, hymenia solitaria aut plura 

 continentia, disco impresso urceolatove, punctiformi aut dilatato. 

 Perithecium proprium bene evolutum, amphithecio thallino goni- 

 dia continente vulgo obductum. Paraphyses bene evolutae, sim- 

 plices aut ramoso-connexae. Sporae breves aut longae, oblongae, 

 eliipsoideaeve aut ovoideae aut fusiformes aut elongatae, septatae 

 et loculis lenticularibus instructae, aut murales, decolores aut 

 demum obscuratae. 



1. Thelotrema, 



Ach., Lich. Univ. (1810) p. 62 et 312 (pr. p.), Syn. Lich. (1814) p. 113 

 pr. p.; Eschw., Syst. Lich. (1824) p. 15, in Mart. Lich. Bras. (1833) p. 172; ; 



: ) Folystroma Clem, vel Ozocladium Mont, forsan hue pertinet, ut ait 

 Nyl. in Hue Addend, p. 124. 



