fungí guaranitici 281 



Hab. Ad ramos emortuos arborum iii sylvis subvirgiiieis prope 



Guarapi, Jan. 1880 (sub niim. 3408). 

 Obs. Species ob marginem sterilem acutum ab hymeiiio prominulo 



conspicue distiactuin, et ob rugam posticam supram margiua- 



lem ab ómnibus cognitis mox dignoscenda. 



33. PoLYPORUS {Pleurolus) auriscalpiüm 'Pers. z=Montg. Ann. Se. 

 nat. ser. III, v. V. p. 367. 



Hab. Ad truncos pútridos humo et detritis foliorum obovolutos 

 in sylvis prope Guarapi, Apr. 4879 (sub nnm. 3361). 



Obs. Specimina guaranitica ad sectionem mesopodium fere ver- 

 gentia; auriculis posticis pilei counato-confluentibus et vix si- 

 nulo et stipite excéntrico manifestis; pilei 3-5 cent, diam.; caro 

 1-1,5 mllm. crass.; tubuli hymenii 3 mllm. long., ore 180-220 

 diam.; stipites 5-8 cent. long. — 5 mllm. crass. basi longe no- 

 doso-radicati. 



34. PoLYPORUs (Pleurotus) siONACHUsSpeg. (n. sp.) 



Diag Pileus horizontalis, applanatus, dimidiato-orbicularis v. or- 

 biculari-obovatus (10-15 cent. diam. — 7-10 cent. lat. ant.- 

 post.) supra planus, antice rotundatus, postice cuneato-incurvus 

 V. reniformi-depressus, lignoso-durus, margine recto, rotun- 

 dato-acutato, cute crustácea, crassa, carne arete adnata, sub 

 pressione areolato-fragili donatus, pallide testaceus v. testaceo- 

 fulvus, opacus, glaber, tactu tamen asperulus, obsolete coneen- 

 trice sulcato-undulatus; caro crassiuscula (0,5-1 cent, crass.), 

 ferruginea v. fulvescenti-umbrina sub cortice pallidior, floccoso- 

 fibrosa, dense obsoletissime zonata; hymenium-compactum, pla- 

 nissimum, pulvere primo albo, dein glaucesceuti-cinerascenti, 

 postremo autem evanescente obductum, e griseo pallide ferru- 

 gineum, antice et postice margine latiusculo (5-6 mllm. lat.), 

 sterili, crustáceo, zonato limitatum; tubuli longiusculi (1,5 

 cent. long. ), umbrino-testacei, intus pulvere grisea obductis, 

 ore rotundato-minutissimo í 100-120 diam. ), dissepimentis eras- 

 siuseulis (80-100 crass.), acie obtusis, integerrimis. Stipes 

 erectus, rectus, crassus (10 cent. long. — 3-3,5 cent, eras.), ir- 

 regulariter undulatus, subplicatus, durus, lignosus, cute crassa 

 crustácea tectus, pilao conculor, cum eo superne incurvato-con- 

 fluens, basi abrupte ac modice scutatim dilatatus, dense minu- 

 teque seruposo-verrucosus, atque matrici adnatus. 



ANAL. 50C. CIENT. ARG. T. XVI. 18 



