fungí argentini 21 



albo, gossypino-fibrilloso stipiti juncto, mox libero sed squa- 

 mulose albo-appendiculato, dein emispliaerico-explaiiatus (20- 

 25'" diam.), circa umbouem saepius depressus, iu juventute 

 totus fülvo-virescens, postea margine et centro ñavescenti-ful- 

 vellus; stipes subfistiüosus, gracilis, elongatus (25-32'"xl-2'"), 

 rectns v. ilexuosus, apicem versus subattenuatus, deorsum in- 

 crassatulus (3'") atque confliieus, totus ex veli frustulis albo- 

 squamulosns praecipue ad tertium superiorem iu parte pileo 

 tecta minute costulato-striatus, extus primo fiavidus, dein late- 

 ritio-lutescens, fibrosulo-tenacellus, intus Elavo-luteus, subcavus; 

 lamellae polymacriae, sinuato-adnatae, confertiusculae, ápice 

 acutiiisculae attenuato-rotundatae, centro ventricosae (2'" lat.), 

 acie integra, primo pallide flavo-virentes, dein lateritio-subvire- 

 scenntes v. lateritio-fulvae; caro pilei tennis tantum ad iimbo- 

 nem incrassata, compactiuscula, succosa, su^^seetione v. pressione 

 pellucida evadens, lútea, cuní illa stipitis concoTbri continua; 

 sporae ellipticae v. ovoideae (6-8x45), utrinque\ obutusae, 

 (quandoque 1-eptatae?) rubigiuosae V. oliváceo lateritiae. 

 Hab. Ad truncum velustum cariosum Salicis humboldtianae in 

 nemoribus secus el Kio de la Plata, Palermo, Maj. 1881. 



i6. Agaricüs (Paneolus) separatus L.-Fr. Hym. Eurp. p. 310. 



Hab. In fimo equino ac vaccino ubique vulgatus per Pampas, 

 praecipue post pluvias, Jan. 1881. 



Obs. Pileus expansus 50-80'" diam.; stipes 90-120'" alt., 7-9'" 

 crass. ; lamellae 8-11'" lat.; caro pilei tennis centro 2-2,5'" 

 crass. Sporae ellipticae v. subgloboso-limoniformes, atrae, opa- 

 cae (18-22x12-15), levissimae. 



17. CoPRiNUS (Pelliculosus) fusgescens Scbaeff. - Pr. Hym. Eurp. 

 p. 322. 

 Hab. In trunco vetusto carioso CelticUs talae in sjdva australiore 



« Real Viejo » dicta, Jan. 1881 . 

 Obs. Pileus primo elliptico-ovoideus (30'" x 15'") rufo-fulvescente, 

 pruina farinácea tcctus, dein glabratus ac rimose-expansus ; 

 stipes albus, glaber, fragilis, fistulosus, exanulatus (40-45'" X 

 3-4'"); sporae ellipticae, saepius inaequilaterales, sursum rotun- 

 datae, deorsum truncatae (8-10 X 5), appendiciüo aegro visibili, 

 subhyalino praeditae, atro-fuligineae. 



