344 MUSEO NACIONAL DE BUENOS AIRES. 



528. Hypoxylon epimyces Speg. ( n. sp.) 



Diag. Euhypoxylon : stromata laxe gregaria superftcialia 

 lenticularia parva punctato-verruculosa nigra opaca glabra, 

 intus farda suberosa alba, perithecüs periphaericis immersis 

 globosis minutis, ascis cylindraceis apar aphy satis, sports ellip- 

 tico-súbnavicularíbus pusillis. 



Hal>. Ad píleos Trametis fibrosae in sylvis prope Formosa, 

 Jan. 1901. 



Obs. Stromata supra pileum v. supra hymenium. praecipue 

 basim versus, insidentia sparsa v. saepius plus mmtisve cíense 

 gregaria v. confluentia, repando- orbicularia ( 2-6 mm dm. = 

 1 - 1.5 mm crss.) superne plániuscula v. undulato-convexula 

 margine rotundata subtus coarctata lafceque adnata, ex peri- 

 thecüs leniter subprominulis colliculosa ostiolisque vix pa- 

 pilliformibus exasperata; peritbecia dense constipata subglo- 

 bosa ( 200 - 250 <i. ) submembranacea superne non v. vix pro- 

 minula; asci numerosissimi ajüce rotundati postice modice 

 attenuato-pedicellati (50 ;>- long. tot. = p. sp. 40 y. = 4-5 (j) 

 octospori; sporae monostichae, ntrinque obtusiusculae (5-7 [*= 

 2-3 ¡j.), leniter inaequilaterales grosse 1-guttulatae laeves 

 pallide fuligineae. 

 520. Hypoxylon rubiginosum ( Prs.) Fr.= Sacc, Syll. fng. i. p. 366. 



Ilal). Non rarum ad ligna decortioata putresoentia per to- 

 ta Eepublica, per au. 1900-1908. 



Obs. Specimina argentinensia etsi liabitu omnia eximio 

 confluentia notis internis tamen satis discrepantia et facile 

 formae nonnullae specifice distinguendae. 



530. Hypoxylon subefíusum Speg.= Speg., Fng. Ghiar. i, n. 204. 



Ilab. Ad truncos cariosos putrescentes Maclurae mora,' [n-ope 

 Formosa, Dio. 1900, neo non Eucálypti globuli prope Santa 

 Catalina, Oct. 1905. 



531. Nummularia frustulosa ( B. & C. ) Sace. = Sacc., Syll., fng. i, 

 pag. 398. 



llah. Ad truncos ck-jectos putrescentes prope Formosa* 

 Dee. 1900. 



Obs. Stromata suborbicularia (2-5mmdm.) depressa la- 

 tiuscula margine obtuso rotundata dense constipata subcon- 

 fluentia, extus atra non v. obsolete granulosa, intus alba: peri- 

 tbecia minuta densa, ostiolo pusillo papillulato ornata, v'x 

 perspicua; asci cylindraeei antice rotundati postice longiu- 

 scule attenuato-pedicellati (part. sp. 40 ;jh=5-6;j- = ped. 25- 



