SPEGAZZIXI: FUXGI AEí^EXTINI. 123 



93. Pholiota platensis ^peg. (n. sp.). 



Diag. Humlgena, phaeofa, caespitom ci-a>ise longeque rad'i- 

 cafa, x)ileo e.v hemtxphaerico expanso non r. r¿jc uinhonato lute- 

 .scente Jaei-i glabro^ margine ¿iicurL-ulo mepeqne appendiciiJato, 

 süpite car nosio- fibroso albo, ápice anmiJo albo xulcato ornato, 

 fiMolo,so laevi v. ri.r fibrilhm), laniellis anfice acufis jjostice 

 sinuafis fruncato-rotiindattx, sordide hifeo-cirescenfibus^ .ywri»- 

 fídigineis JaevibuK. 



Hab. Vulgatus ad terram stercoratam pinguem in Horto bo- 

 tánico, La Plata. Ang. 1893. 



Obs. Solitaria, gregaria v. saep)ius plus niiiius ve ( 3 - 10 ) dense 

 caespitosa; pileus carnosus non hygrophanus, primo fulvus 

 hemispliaericus margine involntus. dein mellens gradatim ex- 

 pansns e convexo planns margine incurvuhis, postremo e In- 

 tescente ochrolencns jolano-depressiis ( 5-lOcm diam.) undn- 

 latus margine rectus v. vix cnrvulus non umbonatus ' v. rarins 

 parce obtusissimeqne ) glaber laevis. ambitn non striatus (vix 

 in senectute irregnlariter snperficialiterqne rimnlosns) in sic- 

 co saepe subnitens, in ndo viscosnlns ; caro alba immntabilis 

 flocculoso- compacta snbexsncca, ad centriim crassa (G-IO 

 mmdiam. ) ad marginem nsqne evoluta: stÍ2:)es erectusrectns 

 v. snbarqnatulns non v. vix tortns (4-8 cm long. = (3-12 

 mm diam.) teres v. apicem versns com[»ressulus. qnandoqne 

 aeqnalis, qnandoqne snperne v. saepins deorsnm incrassatnlns 

 et snbbnlbosnlus. carnoso -fibrosnstenaeellns,intns cavus, carne 

 alba immntabili. extus albas v. snbpallescens, primo laevis 

 V. parcissime fibrillosns v. snbsqnamnlosns: lamellae latin- 

 scnlae (5-8nimlat. ) confertiuscnlae snbmembranaceae poly- 

 macriae acie integerrimae. antice snbattennatae ijostice si- 

 nnatae rotnndato-trnncatae stipiti adpressae, sordide avella- 

 neae v. isabellinae; sporae ovatae v. subellij^ticae ntrim- 

 qne obtusae (10-12 ;-»• long. = (3-7 ;-«• diam.) nmbrinae laeves 

 eguttnlatae. Velnm candidnm membranacenm primitus api- 

 cem stipitis cnm margine pilei connectens dein disrnptns, 

 annnlnm lacernm ex ápice stipitis descendens dense striato- 

 plicatnm et cortinam marginalem plus [minnsve evolntam per 

 aetatem evanidam efformans. Mycelinm gossypino-lanugino- 

 sum valde evolntnm, basiii stipitis cnm térra vestiens atqne 

 funicnlos crassos longinscnlos (3-10 cm long. = 1-5 mm 

 crass. ) radiciformes ramnloso-anastomosantes late sub térra 

 excurrentes liinc inde nodnlose glomernlos pileolorum globo- 

 sornm ornatos constitnens. 



