FÜNGI GUAnANITICI 273 



Diag. Gregariiis, erectus, rigiduliis; pilcus primo hemisphaerico- 

 giobosus, dein applanato-hemisphaericus (2-3,5 mllni. diam.), 

 medio umbilicatus, margine incurvus et subgrosse sulcato-im- 

 pressus, integer, tenui meaibranaceus, tenacellus, sórdida albus 

 (in sicco pallide nifescens), centro vix fuscescens, glaberrimus; 

 lamellae paucae plicaeformes ac subcrassiusculae, pileo con- 

 colores, antice attenuatae, postice truncato-adnatae; stipes lon- 

 giusculiis, gracilis (3-4 cent. long. —0,20-0,25 mllm. crass.), 

 erectus, rigidulus, teres v. (in sicco) compressus, sordide albo- 

 fulvescens v. pallescenti-fusciis, laevis, glaber, subsericeo- 

 nitidiis (in sicco subflexuosus atque laxe tortas), basi non v. vix 

 subincrassatulus et subater, insititius. 



Hab. Ad raniulos et caules humifusos putrescentes in sylvis prope 

 Guarapi, Mart. 1880 (sub num. 3379), 



Obs. Species pulchella inter Marasmium androsaceum Fr. et M. 

 glahellum Pck. fere médium, sed ab utroque notis perplurimis 

 recedens. 



i9. Marasmius (Rotula) trichorhizüs Speg. (n. sp.) 



Diag. Mycelium rhizomorphoideum, gracile, setae equinae crassi- 

 tudine v. vix ultra, rigidulum, glabrum, atrum, subnitens, sub- 

 strigose ramosum, laxissime latissimeque evolutum (20-50 cent, 

 long. et lat.), ad corticem ac praecipue in ejasdem rimis repens; 

 hinc inde ramulos fértiles (seu stipites) paucos, breviusculos 

 (1-2 cent. long. — 0,15-0,18 mllm. crass.), erectos emittens. Pi- 

 leus hemisphaericus (0,5-1 mllm. diam.), glaber, obscure testa- 

 ceus V. rufescens; lamellae paucae, stricte pUcaeformes, pileo 

 concolores; stipes rigidus, erectus, rectus v. subflexuosus (in 

 sicco), ater, subnitens, glaber, laevissimus, ad basin non v. mi- 

 nute leniterque anululato-incrassatulus. 

 Hab. Ad corticem truncorum putrescentium in sylva virginea 



Caá-Guazú, ann. 1880. 

 Obs. Species ab ómnibus adhuc cognitis forma magnitudineque 

 mycelii inconsuetis distinctissima; specimina senescentia ac 

 nonnihil obliterata, iteruní inquirenda ; an novum genus ? 



20. Lentinus {Eulenlinus) víLLOSUsKlotzsch. = Fr. Epic. Syst. Myc. 

 p. 388. 

 Hab. Ad truncos dejectos putrescentes in sylvis subvirgineis pro- 

 pe Guarapi, ann. 1880 (sub num. 3368). 



