fungí argentini 19 



üioplioro discreta, cum stipite coaíinua, inimutabilis, com- 

 pactiuscule subflocculoso-exsucca (i2-i8"' crass,); odor niilliis 

 V. lunginus gratus, sapor glutiiiosus, dulci-su'bacerbulus ; sporae 

 ovatae, obtusissime rotundatae, inferné lateraliter angulato- 

 acutatae, siiperne brevi atteniiato-rotundatae, obtusae (10-42 x 

 8-9), dilutissime rubiginosae. 



Hab. Ad terram prope arbores in syha vetusta australiore « Mon- 

 tes del Eeal Yiejo » dicta, Jan. 1881. 



Obs. Species perpulchra ac certe inter majores adniímeranda; spe- 

 cinien Ínter alia iiiveni mensuribus sequentibus praeditus: Pi- 

 leus 37,5 cent. diam. — Stipes 52 cent. lat. ; 5 basi, 3 medio 

 crass. — Lamellae 25'" lat. — Caro 20 mili, crass. — Observan- 

 dum etiam descriptio cutis pilei nonnliil incerta, nam nunquam 

 exemplar integram eam ferens inventum, ab insectis (Podura 

 sp.) saepius jam in juventute plañe comedita. 



11. Agaricus (Claudopus) variabilis Pers.-Pr. Hym. Eurp. p. 213. 

 Hab. Ad ramos salicinos dejectos putrescentes in umbrosis uligi- 



nosis, Boca del Eiacbuelo, Maj. 1881. 

 Obs. Pileus resupinatus, suborbicularis (3-7'" diam.), membrana- 

 ceus, minute pruinulosus, candidus; lamellae excentrice con- 

 fluentes fulvo-rubiginosae; basidia cylindraceo-clavulata (20 X 

 9-10), hyalina; sporae ellipticae v. ovoideae (7-9 X 5-6), pallide 

 rubiginosae. 



12. Agaricus (Hebeloma) crustuliniformis Pr. Hym. Eurp. 241. 



* AUSTRO-AMEKICANUS Speg. Pileus glaberri- 

 mus, levissimus, primo subemispbaericus (40'" diam.) dein 

 explanato-expansus (60-70'"), ac saepe centro depressulus, mar- 

 gine repando, integro v. parce minuteque fisso, lateritio-gilvus 

 V. lateritio-griseolus, medio non v. obscurior, iove sicco tena- 

 cello-fragilis, in senectute varié lobato-fissus, cute non diffi- 

 cile separanda; stipes albus, carnosulus, teres (50-65"'x 4-6'") 

 basi incrassatulo-clavulatus, levis v. furfuraceo-squamulosus 

 praecipue apicem versus, ubi etiam incrassatulus ; lamellae 

 saepius dimacriae, latiusculae (20-25'" x 7-8'"), confertiuscu- 

 lae, antice acute rotundatae, deorsum rotundato-subliberae, 

 latiores, crassiusculae, superne saepius costato-rugulosae, acie 

 undulata, subcrenulata pallida, primo fulvescentes, dein lateri- 

 tio-gilvae, pulveraceo-tectae; caro pilei candida, compactiuscula, 



