fungí guaranitici 89 



Hab. Ad culmos juveniles Cynodontis dactylon in platea Collegii 

 de Paraguarí, 5 Mart. 1883 (sub num. 3740). 



i04. Ustilago PERiBEBUYENSis Speg. (n. sp.) 



Diag. Sori basin pedunculorum spicularum infestantes, eamque 

 saepe majuscule turgescentes, primo compacti, epidermide tenui 

 plúmbea v. albo-pruinulosa tecti, dein nudi, modice pulveru- 

 lenti, atri v. fusco-atri; sporae lenticulares v. globoso-compres- 

 sae, margine late obtuseque rotundatae (12-13x8-9), intense ac 

 subopace fuligineae, laeves, dense nubiloso-farctae. 



Hab. Ad basin pedunculorum spicularum Cyperi species cujusdam 

 in montuosis Sierra de Peribebuy vocatis, 25 Mart. 1883 (sub 

 num. 3775). 



105. Ustilago setariae NiessL? 



Hab. Ad spiculas Setariae species elatioris cujusdam in sylvaticis 

 prope Paraguarí, Febr. 1883 (sub num. 3738). 



Obs. Sori atri, spiculas singulas implectentes easque non v. vix 

 turgentes v. deformantes, primo compactiusculi, dein ápice 

 dehiscentes ac pulverose dissilientes; sporae ellipticae v. e mu- 

 tua pressione angulosae (7-10x6-7), pallide olivaceo-fuligineae, 

 protoplasmate nubiloso-granuloso farctae, episporio minutissime 

 denseque granuloso-papilloso. 



Species quae sub hoc nomine in Fungis Arg. pug. I, u. 44 et in 

 Decadibus Myc. Arg. n. 4 edita fuit, ab Ustilagme setariae 

 Niessl longe abborrens, ac U. pamparum Speg. vocanda. 



UREDINEAE (Tul.) D.BY. 



106. Gymnosporangium ? guaraniticum Speg. (n. sp.) 



Diag. Keceptacula dense gregaria, verrueas plus minusve evolutas 

 (0,3-5 mllm. magn.), scruposas late ramulos ac folia ambientes 

 efficentia, ápice primo clausa dein irregulariter dehiscenti-per- 

 forata, sordide virescenti v. olivaceo-fusca, epidermide matricis 

 V. stromate nigricante fungilli cujusdam tecta, intus irregula- 

 riter lacunoso-confluentia, pulpa viscoso-mucedinea aurantio- 

 fulvescente v. pallide succinea, longe ac cirrbose per ostiolis 

 protrudente farcta; teleutosporaemuco fasciculatimimmersae.et 

 cum eo e receptaculis exiliientes, elliptico-elongatae t. elongato- 



