28 Jour7ial of Mycology [Vol. 13 



peolaria, and so published it. BuUiard's plant is, however, dif- 

 ferent. It occurs in Sweden but is not as common and in spite 

 of careful search I failed to find it. It is said to have a darker 

 umbo and shorter spores than the true L. metulaespora. The 

 plants we found were well marked by their soft appressed tomen- 

 tose pileus, flocculose veil, and long: spores. These were 15-20 

 X 5-6 mic, and were spindle shaped. The Asheville specimens 

 have slightly shorter spores but agree in all other details with 

 the Swedish plants. At Asheville there are three species of 

 Lepiota belonging to this group, L. metulaespora, floralis and a 

 third species upon which I am unwilling at present to express an 

 opinion. Possibly it may prove to be the true L. clypeolaria, 

 though it seems at present doubtful. Lepiota floralis occurs 

 rarely in open sandy ground and seems to correspond v^ell with 

 Ravenel's plant, which was found in his garden from which he 

 distributed at least three other new species, L. oligosarcus, ful- 

 vaster, and psilopus. These are all small species and from the 

 specimens examined can not be well understood. I have exam- 

 ined two of Ravenel's specimens of L. floralis, one in very good 

 preservation at Washington, the other in the herbarium at Bilt- 

 more. The spores in the latter were examined and were rather 

 larger than the measurements given by Morgan, being 11-13X 

 4-5 mic. and spindle shaped. It is worth suggesting that this 

 species needs further investigation before its status can be con- 

 sidered satisfactory. The conditions under which it is found 

 suggest very strongly that it is only a depauperate form of L. 

 metulaespora. An almost unbroken series of forms can be found 

 in this region connecting the two species, and the points of dif- 

 ference are such as may well be explained by the fact that one 

 form is found in sheltered places in woods and the other in sterile 

 sandy soil in open places. 



NEW GENERA OF UREDINALES. 



BY J. C. ARTHUR. 



As the rusts are more carefully studied, and increased at- 

 tention is given to the minute details of their structure, it becomes 

 possible to find characters which enable one to group the species 

 under genera that show relationship better than by the earlier 

 method of using some obvious character to place many diverse 

 forms under a few genera. The rusts are minute plants, and the 

 diagnostic characters must be sought for with a corresponding 

 minutia. In addition to the strictly morphological characters, the 

 recognition of the invariable relation of the pycnia to the other 

 spore-forms, by which it is possible to judge with much certainty 

 of the nature of the life-cycle, has made it feasible to draw from 



