2p^ ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



Hab. Ad truncos vetustos in sylvis prope Paraguarí, ann. 1880 

 (sine num.). 



35. POLYPORUS (Í/91ÍS?) FORMOSISSIMUS Speg. (n. sp.) 



Diag. Placodermeus; pileus horizontal]' s, applanato-convexas, sub- 

 orbicularis (15 cent. diam. — 10 cent. lat. ant.-post.), antice 

 rotundatus postice subtruncato-reniformis, auriculis cum sti- 

 pite brevissimo, crasso, horizontali confluentibus, saepeque cum 

 eo plus minusve matrice adnatis, dense sed leniter concentrice 

 sulcatus, sulcis undulato-repandis, cute crustácea, tenui, frá- 

 gil!, carne arete adnata, laccato-nitentissima, castaneo-oliva- 

 scente, bine inde (an in locis tritis?), opaca ac violascens, mar- 

 gine non V. vix incurvulo, obtusiuscule retúndate ; carne me- 

 diocri (0,5-1 cent, crass.*), floccoso-fibrosa, sub cute pallescenti- 

 fulva, ceterum ferriigineo-umbrina_, compactiuscula, obsolete 

 zonata; bymeniam planum, compactum, durum, aequali, non 

 stratosum, margine sterili stricto, obtuso, sulcato, nitente ac 

 olivaceo-castaneo v. opaco et violascente cinctum, etiam in parte 

 postica, primo pulvere albida obductum, dein pallide griseo- 

 fulvescens; tubuli longiusculi (1 ,5 cent. long. post.), dense sti- 

 pati, griseo-umbrini, intus pruinula albo-grisea plus minusve 

 obductis, ore párvulo (150-200 diam.), in juventute albo-obtu- 

 rato, dissepimentis mediocribus (40-50 crass.), acie obtusiu- 

 sculis, integerrimis. 



Hab. Ad truncos vetustos cariosos in sylvis prope Paraguarí, 

 ann, 1880 (sine num.) 



Obs. Species piilcherrima Polyporo lucido Fr. formae sessili valde 

 affinis; ad sectionem pleurotorum nonnihil vergens ob stipitem, 

 etsi auviculis pilei connatum, manifestum (3 cent. long. — 2,5 

 cent, diam.), basi late truncato-adnatum. 



36. POLYPORUS ( i/)lW ) HYLOCHARIS Speg. (u. Sp.) 



Diag. Placodermeus, stratosus; pileus maximus, orbiculari-expan- 

 sus (30 cent. diam. — 25 cent. lat. ant.-post.), postice rotundato- 

 adnatus, superno applanatus, concentrice plurisulcatus, plicis (seu 

 margines pilei annornm praeteritorum) dúo ,us posticis planis 

 distantibus, tribus anticis subiingulato-superimpositis, ómnibus 

 valde prominentibus, crassis, acutatorotundatis, undulato-zona- 

 tis, laxe obsoleteque gibbuloso-undiilatus, cute crassa (1 mllm. 

 crass.), durissima, carne arete adnata, fusco-subatra v. sordide 



