SPEGAZZIXI: FUNGÍ ARGENTINI. 91 



iimboue et squamulis per aetatem fuscescentibus, margine 

 integer acutns densissime (ad médium usque) minute plicato" 

 striatus; caro vix in umbone evoluta albo-fuscescens fibroso" 

 flocculosa tenacella inodora; lamellae confertissimae polyma- 

 criae membranaceae latiusculae (12-15 mm long. =-- 3-4 mm 

 lat.) tenues adscendentes antice attenuato-acutatae, postice 

 attenuatae abruptiusculeque sinuatae a stipite remotiusculae, 

 primo candidae dein roseolae: stipes teres parce elongatus 

 (40-50 mm long. = 1.5-5 mm diam. i sursum gracilis, deorsum 

 leniter subfusoideo-incrassatus, basiiterum attenuatus, glaber 

 laevis albus, mycelio concolore gossypino parcissime radicatus, 

 intus late fistulosus, cavitate fibrillis araneoso-sericeis repleta, 

 carne fibrosula roseóla donatus : annulus fixus descendens 

 membranaceus mediocris farinosulo-furfuraceiis facillime fru- 

 stulatim evanescens. Collarium crasse carnosum, ruga non li- 

 mitatum, areola circum stipitis apicem augusta (1 mm lat.). 

 Pulvis sporarum primo albus dein perdilute roseus; sporae 

 subglobosae (6-8 ¡^ long. = 5-7 u diam.) apiculatae saepius 

 grosse 1-guttulatae laeves, primo hyalinae dein dilutissime 

 roseolae. 

 15. Lepiota denticulata ^peg. (n. sp.). 



iJiag. Proct'i-fi/. 2)ileo non v.vix iinihonato ex heuiisphaevico 

 explanato carno.sido sordkle fusco laeri, amhitu plus minusve 

 reticnlato r. radiatim rimulo.so, margine crassissinio late lamel- 

 las excedente eromlo, lamellis albo -roséis acie dense mimiterpte 

 denticulatis, stipite albo cylindraceo basi plus minusve incras- 

 sato fistuloso, annulo crasso mobili albo adscendente, sporis 

 laecilnis. 



Hab. Ad terraní in umbrosis lierbosis prope La Plata, Mar- 

 tio, 1894. 



Obs. Solitaria v. laxe gregaria : pileus primo ovatus obtusus 

 laevis glaber dein hemispliaerico-explanatus ( 5-8 cm diam.) 

 centro non v. obsolete umbonatus laevis sordide f uscus, ambi- 

 tu albus V. pallide fuscus quandoque dense adpresseque prui- 

 nuloso-squamulosus, quandoque grosse laxeque reticulatim 

 V. radiatim rimulosus, margine crasso membranáceo -flocculoso 

 erosulo late (2-3 mm lat.) lamellas excedente; caro subcrassiu- 

 scula alba immutabilis: lamellae antice attenuato-acutatae, 

 postice attenuato-cuneatae (18-25 mm long. = 4-5 mm lat.) 

 stipite vix remotae confertae membranaceae ex albo perdilute 

 roseae acie minutissime albo-granulosae v. denticulatae; sti- 



