LICHENES EXTRA-EUROPjEI. 227 



26. Leptogium marginellum Mont. Lich. Cuba p. Ho, Wain. Etud. Lich. Brés. 

 I, p. 218, Mull. Arg. Lich. Beitr. n. 1120 ; Lichen marginellus Sw.; Collema marginellum 

 Ach. Lichenogr. unio. p. 656; Leptogium tremelloides var. marginellum Nyl. apud Hue Lich. 

 exot. n. 100 et L. corrugatulum Nyl. ibid. n. 125. 



In Africa : in ins. Borbonia, corticolam in Mafate et sine loco indicato legit fr. Rodri- 

 guez, anno 1889. 



ïhallus cinerascens irregulariter lobatus, lobis rotundatis aut crispatis supra et infra 

 rugulosus, rugis sat elevatis et ssepius sensu longitudinali dispositis; intus sat stricte 

 contextus; gonidia diam. 3-5 [j. lata. Apothccia in margine thalli aut rarius in rugarum 

 dorso enata, parvula, numerosissima, margine integro sœpe lacinulis thallinis ornata 

 atque disco rufo prsedita. SLructura apothecii ut in L. tremelloide var. aesio. Spora3 

 3-5 septatee etmurali-drvisEe, 20-30 ;x long» et 10-12 [xcrassae, Tuck. Synops. north Americ. 

 Lich. I, p. 163. 



In America : 1. in Louisiana, ad arborum truncos, rivière de Cowington, n. 92, 

 6 augusli, Lafayette, n. 90, 1 septembris 1886, legit abb. Langlois; fertile. — 2. In 

 Guyana Batavorum, prope Paramaribo, legit Kegel, n is 550 et 551 pr. p., junio 1844; 

 fertile. 



In Asia (ins. Andaman et Java) in Africa calida; in America utraque ; in Australia cl Polynesia. 



27. Leptogium ehloromelum Nyl. apud Hue Lich. exol. n. 118. 



In America: 1. in Louisiana, ad Castaneas et Quercus, ouest de la Louisiane, legit abb. 

 Langlois, 6 septembris 1885. — 2. In statu Mississipi, ad truncos, rivière de la baie de 

 Saint-Louis, legit idem collector, 28 aprilis 1885. 



Margo apothecii quœ oculis nudis simplex videtur e duobus marginibus in lamina Lenui 

 •visibilibus componitur : interior pseudo-parenchymaticus e perithecio bcne evoluto et 

 continuato et exterior ex elementis quœ in thallo reperiuntur, scilicet gonidiis, hyphis et 

 cortice celluloso, efformatus. 



In Asia meridionali ; in Africa (Usambara) ; in America utraque; in Polynesia et in Nova- 

 Zelandia. 



28. Leptogium fallax Mull. Arg. Lich. Beitr. n. 373. 



— F. 1. isidiigerum Hue. 



In Asia : in ins. Sumatra, sur les Cocotiers, Kampong Gau, legit D r Massart, martio 

 1895. 



ïhallus minus fuscus, magis plumbeo-cœrulescens quam in forma genuina, passim in 

 superficie, crebrius in loborum et apotheciorum margine isidio munitus, apotheciis junio- 

 ribus nudis. Margo apotheciorum duplex ut in specie preecedente. 



— F. 2. cœrulescens Hue. 



In America : in republica Mexicana, Chimaleapan, cerro de Santiago, circa de Lerma, 

 legit D r P. Maury, n. 3328 et n. 3328 bis pr. p., 27 junii 1890. 



Thallus plumbeus, magis cœrulescens quam in specie genuina, lobatus, loborum 

 marginibus leviter undulatis aut integris, supra subtiliter rugosus, subtus concolor et 

 seque rugosus; intus laxe contextus. Apothecia 1-2 mm. lata, pallide vel intense rufa, 

 margine sat crasso, minute et sphacrice rugoso, raro granuloso, sub microscopio margine 

 duplice prsedita, interiore perithecio continuato, exteriore hyphis, gonidiis et cortice 

 celluloso formata; epithecium brunneo-rufescens ; hypothecium incolor; perithecium 

 cellulis magnis efformatum ; sporœ 8 nœ , murali divisa;, 22-26 ix longse et 13 \j. latœ. 



A specie genuina, secundum descriptionem, colore et lobis amplioribus recedit, sed 

 apolheciis omnino cum ea convenit. 



In L. bullato Nyl., Wain. Etud. Lich. Brés. I, p. 229, margo apothecii primum in 



