78 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



flocculoso, albo-subgriseo vestitus, ceterum glaber, ligneo-palle- 

 scens, margine integro v. repando-subcrenato ac plus minusve 

 dense tomentoso ; hymenium albo-carneum, pulvere detersili 

 alba adspersum, leniter flabellatim undulatum ; stipes teres 

 hymenio concolor v. tíx fuscescens, glaber v. irregulariter 

 griseo-velutinus (l-i,5 cent. loDg. — 3-4 mllm. crass.) 



Hab. Ad ligna decorticata putrescentia in sylva subvirginea Caá- 

 guazú vocata, ann. 1880 (sub num. 3358). 



Obs. Species certe a Stereo cyathiforme Fr. longe recedens, nec 

 comparanda ; an tantum varietas v. forma juvenilis praeceden- 

 tis? 



72. Stereum (Pleurotus) HkmnECOWiELnk.— Fr. Epicr. Syst. Myc. 

 p. 546. 



Hab. Ad truncos dejectos putrescentes in sylvis prope Guarapí, 

 ann. i880(sub num. 3350). 



Obs. Ferrugineum v. ocbraceum, glabrum, superna laeve v. squar- 

 rulosum, inferné minute denseque setulosum ; setulis obscure 

 ochraceis, lente valida tantum perspicuis. 



Stereum (Apus) mytilinüm Fr. =: Epicr. Syst. Myc. p. 548 n. 49. 



Hab. Ad truncos emortuos putrescentes arborum in sylvis prope 

 Paraguarí, Febr. et Maj. 1882-4883 (sub num. 3390-3915). 



Obs. Pilei saepius seriati, gregarii liberi v. confluentes, quando- 

 que orbiculares, quandoque conchato-dimidiati, magnitudine 

 ludentes (1,5-5 cent, diam.), membranaceo-coriacei, rigiduli, 

 excentrice v. centro umbonato-sessiles (saepe breviter subpedi- 

 cellati), superne (dorso) sordide fulvescenti-grisei, tomentosulo- 

 velutini, leniter concentrice sulcati, sulcis paucis, strictis, gla- 

 bris, castaneis^ subnitentibus, margine acuto, integro, recto, 

 non V. strictissime castaneo-glabrato ; inferné (hymenio) sor- 

 dide carnei v. carneo-lividi, glaberrimi, non v. obsoletissime 

 concentrice undulati. Speciminaguaranitica a descriptioneFrie- 

 siana nonnihil recedunt et ne sistant speciem alterara dubito. 



74. Stereum (Apus) elegantissimum Speg. (n. sp.) 



Diag. Pilei gregarii, borizontaliter seriati saepius lateraliter con- 

 fluentes, nec non superposito-imbricati subconchati, dimidiato- 

 expansi, parvuli (2 cent, diam.— 1-1,5 cent. lat. ant.-post.), po- 

 stice cuneati v. truncato-adnati, non v. vix elfusi, margine recto 

 V. iucurvulo, acuto, integro v. parce subcrenato-repando, tenu- 



