22 Hymenomycetap, Agaricacefe, Leucosporse, Tricholoma. 



compresso v. irregulariter sabcanaliculato^ ima basi albo et myce- 

 lii causa farinoso, superiie sorclide albo v. pallide isabellino, levi, 

 glabro V. vix laxissime minuteque longitudinaliter fibrilloso, sub 

 pileo ssepius iterum albo sa^peque farinoso-puberulo ; carne alba in^ 

 pilei umbone fere tantum cvoiuta ct ad marginem tenui, floccu- 

 loso-spongiosa, hygropliana, exsucca, illa stipitis fibrosa valde scis- 

 sili concolore; lamellis confcrtis, niembranaceo-crassiusculis, antice 

 attenuatis, postice dilatatis, 3-7 mm. latis, primo adnato-rotunda- 

 tis, dein subsinuato-decurrentibus, acie integerrimis, albis, iminu- 

 tabilibus; sporis ellipsoideis, utrinque obtusis, levibus, granuloso- 

 farctis, hyalinis, 8-10 « 6-8. 



Hab. ad terram in herbosis umbrosis pr. La Plata Argentinaj 

 hiemali tempore. — Totus fungus in prima setate rigidulus, dein 

 fragiUs, cute pilei faciUirae sex>arabiii atque in fibras solvenda. 

 Odor funginus; sapor parum evoliitus amarus. 2\ melaleuco, ut 

 videtur, valde affine. 



6. Tricholoma portentosum Fr — Syll. V, p. 89. — var centrale i 

 Peck, 52 Rep. State Bot. Mus. New York, p. 655. — Pileo pal- 

 Hde flavo v. virescenti-flavido, centro obscure brunneo; lameUis 

 ssepe lineis paUidioribus irregularibus striatis. 



Ilah. ad terram, Sand Lake AmericsB bor. 



7. Trlcboloma argentlnum Speg. Fg. Arg. noviv. crit, p. 100(1899); • 

 CoUyhia lacerata Lasch var. argentina Speg , Sacc. SyU. V, p. 248. 



Ilab. ad foUa dejecta putrescentia in umbrosis, Argentina. — 

 Species T, nudo BuU et T. sordido Fr. peraffinis, sed, ut videtur, 

 ab utroque sat distincta. 



8. Tricholoma latifolium Speg. Fg. Arg. novi v crit , p. 102 (1899). ' 

 — PUeo primo globoso, dein applanato-expanso, 1 '/^^^ cm. diam , 

 in juventute glabro levique centro rufescenti-testaceo, ambitu pal- 

 Hdiore atque subfibriUoso, non striafco, per setatem sordide testa- 

 ceo ruguloso, margine fi.sso hinc inde subrevoiuto ; carne vix cen- 

 tro evoluta, 2 mm. crassa, ex albo flavescente; stipite tereti, apice 

 basique non v. vix incrassatulo, levi v. vix fibrilloso-striato, gla- 

 bro, e rufescente flavescente, apice pallidiore, basi abrupte trun- 

 cato-mycelifero, 2'/^ cm. longo, 3 mm. crasso, late fistuloso; Ja- 

 meUis trigonis, confertiusculis, latissimis, 7-8 mra. longis, 5 mm. 

 latis, antice rotundatis, postice adscendenti-sinuatis, vix denticulo 

 adnatis, membranaceis, flavescentibus, acie integerrimis concolori- 

 bus; sporis eUipsoideis, sa3pius grosse 1-guttulatis, levibus, hyali- 

 nis, 6 V B. 



