94 MUSEO NACIONAL DE BUENOS AIEES. 



lenissime incrassatiis sed iimiquaiii bulbosas (5 min diam.); 

 aunulus mobilis albns membraiiaceus adscendens subfusax. 

 Collarium pariim manifestiim, areola apicis stipitis strictissima. 

 Sporae ellipsoideo-ovoideae (7-9 ;■<• long. = 3-4 \}- diain.) l-v. 

 2-guttulatae. Iwalinae. laeves: cystidia clarato-fusiformia 

 (25-30 !J- long. = 10-12 'j- diam.) a^iice acutiuscnla laevia. 



cj Hniulosa. Solitaria: jJÜeus glaber dense radiatim riniulo- 

 sus, rubro -ruf es cens, primo globosas v. ovoideus dein campa- 

 nulatiis postremo convexnlo-expansns (30-50 mm diam.) cen- 

 tro obsolete umbonatns, umbone saepius integro umbilicato, 

 ambitu saepius pallidior atqne densius albo-rimulosiis, margi- 

 ne aeutissimus. integer exappendiculatns; lamellae antice cn- 

 neato-acntatae, postice attennato-rotiindatae atque snbsinua- 

 tae í 12- 17 mm long. =3.5-4 mm lat. ) a stipite remotiuscnlae, 

 candidae, aeie integerrimae: stipes erectns rectns crassiusculus 

 teres (25-50 mm long. ==3-8 mm diam. j eandidus, laevis, deor- 

 sum saepius valde inerassatus atque bulbosus (8-15 mm 

 diam.) parce fistulosus; annulusfixus albus descendens, mem- 

 branaceus saepe jilicatulo-striatus subpersistens. Collarium 

 bene evolutum carnosum. areolam pro ratione latiusculam 

 (1-1.5 mm lat.) circum stipitis apicem efformans. Sporae 

 ovideae ('7-8 [>■ long. ^5 \j- diam.)intus dense minuteque gra- 

 nulosae hyalinae; cystidia ellipsoideo-fusiformia aj^ice supero 

 granuloso -liispidula. Cutis pilei lacerata v. perforata saepius 

 j)ulclire azurea evadit. 



d) sqnamidof>a. Solitaria; pileus |)rimo globoso -ovatus dein 

 convexulo-applanatus (35-40 mm diam. ) centro leniter umbo- 

 natns atque rubro -ruf escens saepeque per aetatem depressulus. 

 ceterum albus. ubique squamulis triangulariljus fibrillosis 

 rubro -ruf escentibus plus minusve densis adpressisque vestitus. 

 margine acutiusculus liinc inde rimulosus y. fissus, exappen- 

 diculatns; lamellae antice acutiuscule rotundatae, postice lon- 

 giuscule cuneato-attenuatae Í12-15mm long. =3-3,5 mm 

 lat.) a stipite remotae candidae acie integerrimae; stipes erec- 

 tus rectus crassitudine ludens. teres ('35-60 mm long. = 4-() 

 mm diam. i eandidus laevis. deorsum \)\\xi> minusve incra.ssatus 

 saepeque subbulbosus (7-12 mm crass. ) late fistulosus; annu- 

 lus mobilis albus descendens membranaceus sae})e margine 

 2)licatulus subfugax etsi tenacellus. Collarium bene evolutum, 

 rugula promiiuilalimitatum, areolam stipitis apicis latiusculam 

 (1,5-2 mm lat.) efformans. S2)orae e globoso ovoideae ((5-7 



