h*. 



Journal of Mycology 



VOLXJIME 13 - JAlSrXJAFlY 1907 



TABLE OF CONTENTS 



Morgan — North American Species of Lepiota (concluded) 1 



Kern — The Rusts of Guatamala IS 



Beardslee — The t,epiotas of Sweden 26 



Arthur — New Genera of Uredinales 28 



Kauffman — The Genus Cortinarius with Key to the Species 32 



Editor's NOTES 40 



botan 



NORTH AMERICAN SPECIES OF LEPIOTA. 



BY A. P. MORGAN. 



(^Concluded frotn page 203.) 



VIII. HIATULOIDES. Pileus suhmemhranaceous, thin, 

 soft and Hexible, umhonate; the Hesh well nigh obsolete except 

 beneath the central disc; the dermis radintely Hbrillose and pli- 

 cate-sulcate often to the umbo; the cuticle separating into scales. 

 Stipe slender and sometimes much elongated, fistulous and fra- 

 gile, subglabrous; the annulus thin and membranaceous. 



A tribe of many species taking its name from Lepiota 

 hiatuloides Speg. Like the genus Hiatula to which it is related, 

 its members abound in tropical regions ; in colder climates some 

 of them appear in greenhouses, on hot beds and in similar situa- 

 tions. 



a. Pileus white with pallid or brozvnish scales. 



60. LEPIOTA FARINOSA Peck, 43 N. Y. Rep. 1889. 

 Pileus submembranaceous, oblong-ovoid then campanulate 

 and expanded, umbonate, the dermis white beneath the cuticle, 

 flocculose-farinaceous, plicate-sulcate around the margin ; the cu- 

 ticle thin, whitish or pale alutaceous, at first continuous, very soon 

 separating into small scales except upon the umbo, which at 

 length are widely scattered and deciduous. Stipe tapering up- 

 ward from a clavate base, more or less elongated and flexuous, 

 hollow, white, subglabrous ; the annulus a thin membrane, sub- 

 O persistent. Lamellae rather narrow, close, free, white ; spores 

 22 elliptic-ovoid, sometimes oblique, 8-10x5-7 mic. uniguttulate. 

 I Caespitose ; growing on old manure heaps, in the rich soil 



<^ of gardens, etc. Boston, Mass., Forster; Preston, O. Common 



