fungí argentini 25 



24. PoLYPORüS (Mesopus) platensis Speg. (n. sp.) 



Diag. Pileus emispliaerico-applanatus, jam in juventute profunde 

 umbilicatus, iafundibiüiformis, margine tenui, udo recto integro, 

 sicco intiis involiito hinc lude fisso , glaberrimiis levissimus 

 (20-50'" diam.), primo sordide pallideque alutaceo-su'bgriseos, 

 dein fulvo-rubescens, centro quandoqne pallide sanguineus ; sti- 

 pes centralis rectus v. undulatus, basi irregulariter incrassatus 

 tenacissime adnato-tuberculosus, medio subteres, sursum com- 

 presso-dilatatiüns (20'"x4-6'" crass.) extus sordide albens v. 

 fuscescens, glaber v. miaute laxeque fusco-papillosus v. squa- 

 muloso-fibrillosus, intus farctus, candidas, carnoso-tenacissi- 

 mus, cum carne pilei homogénea continuus; bymeniopliornm per 

 stipitem descendens, ad margine pilei atteniiato-obliteratum, ad 

 médium taiitum fertile, tubulis cjliadraceis minntulis (1-1,2'" 

 long. X 0,2-0,3"' diam.) tenui-membranaceis, rigidiilis, ore sub- 

 aequalibus, aeie acata integerrima compositam; caro pilei cum 

 hymeniopboro ac illa stipitis continua, candida ad margineni 

 gradatim attenuata, compacta, uda flexilis ac moUis, sicca in- 

 durata ac sublignea; sporae non visae. 

 Hab. Ad truncos dejectos putrescentes Salicis humboldtianae ^tqxiQ 

 Celtidis talae, Boca del Kiachuelo, et Bañado S. J. de Elores? 

 Mart. 1880. 



25. PoLYPORUS (Resupinatus) perparadoxus Speg. (n. sp.) 



Diag. Biformis, sempertamensGutato-resupinatus; pilei stfiriles(?) 

 crassi, lignoso-substupposi, orbiculares v. piares confluendo el- 

 liptico-polymorpbi, centro plus minusve late adnati (2,5-5'"diam. 

 x2-3'" lat), ambitu latiuscule libero-elevati, fusco-atri, glaber- 

 rimi, ecorticati (?), uiidulato-gibbulosi, margine obtusiusculo, 

 repando, abrupto fuívo-zonato; hymeniumquandoque simplex(ex 

 alveolo único efformatum), cupulatum, quandoque multialveola- 

 tum; alveoli in queque pileo subaequales, sed in variis piléis 

 differentes, saepius late aperfci, (0,5-3'" diam), orbiculares v. ob 

 confluentiam labirintiformi-sinuosi, glaberrimi, intus intense 

 fusco-cinnamoniei, marginem versus pallescentes, ac fulvescen- 

 tes; septa plus minusve incrassata, cum carne pilei continua, 

 quandoque acic acufca lacerato-dentata (in forma dedaleoidi), 

 quandoque obtusissima atque applanata pallide fulva, glabra sed 

 ruvidula ; pilei fértiles, non rarius cum sterilibus confluentes, 

 extus ut steriles, sed sabmembranacei, tenacello-cartilaginei, 



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