222 Acta Societatis pro Fauua et Flora feuuica, VII. 



decolores. Coweptacula piicnoconidioruui (liallo imiiiersa aut 

 verriieas lliallo obductas rormantia, pallida. ISterifjmata ramosa 

 aut simplic-ia, constrictc arliculata, articulis numerosis, brevibus. 

 Pijcnoconidia brevia, cylindrico-oblonga aut apicibus levissime 

 incrassatis, recta, tcnuia. 



Sect. 1. Diplothallus Wainio. Thallus Ibliaceus, duplex, e 

 lamellis duabus superpositis consimilibus passim connatis forma- 

 tus, rhizinis destitutus. Sporae murales. 



1. L. punctulatum Nyl., Lich. Mexican. (1872) p. 1. 



Thallus duplex, e membranis foKisve constans duabus su- 

 perpositis, omnino consimilibus, passim (trabecuHs) conjunctis, te- 

 nuibus, irrcgulariter iteratim lobatus aut laciniato-lobatus, lobis 

 primariis circ. 10 2 millim. latis, adscendentibus confertisque, 

 lobis apicahbus circ. 3 2 milhm. latis, ambitu rotundatis, axihis 

 vulgo sinuato-dilatatis, pkimbeus aut rarius plumbeo-caerulescens 

 ohvaceusve, minute impresso-inaequahs. Stratum meduUare haud 

 distincte mucosum. Apothecia supra thahum sparsa, 1,5 1 mil- 

 hm. lata, peltata, basi thahina concava saepe ad instar stipitis 

 brevis leviter elongata, disco rufo aut fusco- vel testaceo-rufe- 

 scente, margine pahido, integro. Excipulum grosse parenchyma- 

 ticum, strato meduUari tenui, gonidia continente. Sporae fusifor- 

 mes, murales, long. 0,oi6 0,0 2 5, crass. 0,oo7 0,oo8 mihim. 



Ad terram humosam in silvis Garassae (1400 1500 metr.. 

 s. m.) passim abundanter obveniens, n. 380, 1216. Ad hanc plan- 

 tam pertinet Lichen tremelloides Ach., Lich. Suec. Prodr. 

 (1798) p. 136 (Aleth. Lich. p. 224) secundum specimina ex Africa 

 (a Thunb.; lecta) et ex Antihis in hb. Ach. (haud Linn., Suppl. 

 1781 p. 405: hb. Linn.). Huc etiam referendus est coH. Lindig. n. 

 86 (nomine ,,L. diaphani": mus. Paris.). Thallus sat fragihs, 

 superne et inferne glaber, ad trabeculas impressus, saepe plagas 

 12 centim. latas formans, laciniis circ. 25 mihim. longis. Folia 

 superposita circ. 0,025 0,030 milhm. crassa, interdum particuhs 

 SLibstrati (graminibus, cet.) parce disjuncta, textura consimiha, 

 (ambo) superne et inferne strato corticah grosse parenchy- 

 matico (hmiine ceUularum 0,oo8 0,oo4 miihm.), e serie simphce 

 cellularum formato instructa, strato meduhari tenui, gonidia con- 



