lio Ml'SEO XACIOXAL DE BUENOS AIRES. 



glaljer; caro alba flocculosa tenacella vix centro evoliita; la- 

 mellae membranáceo -crassiusciilae confertae, acie integrae. 

 antice acutatae. ])08tice rotnndato-subadnatae lentae latinscu- 

 lae (8 mm lat. ) ex albo perdilute roseae; stipes erectus rectns 

 (40 mm long. =2-3 mm diam.) teres glaber laevis tenax 

 fibroso -cartilaginens. deorsnm sensim incrassatnlus, ad basin 

 pruiniila tabacina parum perspicua tenuissima adspersus, hj^- 

 grophanus. deorsnm lateritins, sursnm pallidior, snb pileo 

 fere albus, late f'istnlosns, tenniter modiceque radicatns. Spo- 

 rae minntae ovatae (5-G ¡j- long. ^=2-3 ;j- diam. i laeves, hja- 

 linae. 

 64. Marasmius bonaérensis ^peg. (n. sp.j. 



Diafj. CoUijhia calopoda inodora, píleo hemhpJiaeríco laevi 

 (jlahro e roseo rufescente v. perdilute roseo crassiu.scnle mem- 

 branáceo e.sirio, lamelUs lafiusculis subconfertis alhis, stipife 

 rigidulo stirsnn/ glabro alhoque, deorsunifuscescente atque prui- 

 niiloso, insititio. 



Hal). In corticibns radicnm nec non in f oliis coriaceis putre- 

 scentibns, prope La Plata, Mart. 1888 et Jan. 1889. 



Ohs. Species pnlcliella in vivo sublenta in sicco flaccidula^ 

 sparsa v. laxe gregaria pnsilla: pileus semper hemisphaericus 

 (3-5 mmdiam. ) crassiuscule membranaceus lentns laevis glaber 

 nec nmbilicatus nec striatus, in juventute e roseo rufescens, 

 per aetatem ex albo rosens ; lamellae snbcrassiusculae subcon- 

 fertiusculae latinsculae, postice primo subsinuato-adnatae dein 

 leniter decnrrentes atqne snbcollariatae, acie obtnsinscnlae 

 atqne e pulverulento denticulatae albae; stij)es tennis rigidu- 

 lus erectus rectns V. flexuosulus (10-15 mm long. =0,5mm 

 diam.) sursnm albus glaber, deorsum plus minusve rufescens 

 V. lateritins etfugacissime laxeque albo-pulverulentns, opacus 

 insititius. Sporae non visae. 

 55. Marasmius ramealis íBull.) Fr. — Sacc, 1. c, f. 531. 



Hah. Ad ramulos dejectos putrescentes in Parque de La 

 Plata, Mart. 1888. 



Ohs. Pileus liemispliaerico-explanatus candidus glaber lae- 

 vis lento -membranaceus: lamellae laxae candidae crassae acie 

 integrae obtusae, antice rotundatae, postice attenuato-adna- 

 tae; stipes compressus ajíice sordide ex albo liyalinus, deorsum 

 fusco -rufescens glaber in sicco tortus basi insititius; sporae 

 elliptico-cylindraceae utrimque obtusiusculae (10 \>- long. =3 

 [1- diam. ) leniter inaeqnilaterales laeves hyalinae. 



