SPKGAZZIXI: FUXGI ARGEXTIXI. 143 



131. Agaricus farinosas Speg. (n. sp.). 



Diag. PiJeo cra.sse carnoso convexo saepe centro depresso, 

 primo candido farinoso -fúrfur ello ^ dein leniter subfuscescente 

 fere laeci, lamellis afro-purpureis anfice acufafis postice sinuato- 

 rofundafis, .sfÍ2)ife curto cra.sso farcto albo-squaniuloso ha.si 

 suhincrassato appendiculato-marginato. aninilo mo.v evanido^ 

 sporis atro -pu rpu reís. 



Hah. In pratis eclitioribus prope La Plata, Mart. 1894. 



Ohs. Solitarius v. 2-3-gregarins, e térra erumpens; pileus 

 primo globosiis, dein applanato-expansus convexulus, postre- 

 mo dej^ressiis v. subrevolutus (6-10 cm diam. j, in prima 

 aetate candidns farinoso -fiirfnracens, per aetatem nndns v. 

 tíx adjíresse subaraneosus albus v. leniter snbfuscescens gla- 

 ber laevis, margine incurvulo e fnrfnraceo farinuloso membra- 

 náceo breviter lamellas excedente (Immlat.j; caro crassa (10 

 mmdiam. ) compacta subexsiicca, in sectione leniter roseo - 

 fuscescens, fere ad marginem nsqne prodiicta ; lamellae conf er- 

 tae membranaceae snberassiuscnlae subfragiles (30-40 mm 

 long. = 5-7 mm lat.) antice attenuato-rotundatae postice 

 siniiato-rotnndatae, primo albae dein din carneo-v. roseo -cine- 

 rascentes, j^ostremo umbrino-carneae, in senectute atrae snba-' 

 rescentesqne. Stipes aegre a pileo secedens cnrtus crassus 

 carnosns farctus teres ( 30-35 mm long. -- 18-20 mmdiam.) 

 dense minnteqne sqnamnlosns albiis basi non v. parce bulbo- 

 sns ibique cingido v. annnlo tenniter rngiformi (fere volvae 

 rudimento I ornatus, snb annulo laevis, in juventute albus, per 

 aetatem in'aecipue ad partem superam fuscescens. Annulus in 

 2)rima juventute margini pilei et basi stipitis adhaerens, bene 

 evolutus, sed mox evaneseens et vix in margine pilei et in super- 

 ficie stipitis squamulose manifestus. Cutis pilei crassa f acillime 

 integra separabilis. Sporae e globoso ellipsoideae v. ovatae 

 ((> a long. — 5-5.5 ;a diam. i fuligineo-cinereae laeves, grosse 

 1-guttulatae. Edulis. gratus. 



132. Agaricas farinosus Speg. var. laevipes Speg. 



Hah. In umbrosis s^dvularum, Ensenada, Mart. 1888. 



Obs. A tj'po recedit statura paulo minore et carne magis 

 compacta. Pileo liemispliaerico - umbilicato, lamellis diu albo- 

 roseis, carne fere immutabilis, stipite pro ratione magis elon- 

 gato, basi non bulboso, medio annulo membranáceo -floccu- 

 loso mox evanido vestito laevi glabro v. vix infra annulo mi- 

 nute adpresseque squamuloso. 



