392 Wisconsin Academy of Sciences, Arts, and Letters. 
ADDITIONAL SPECIES OF PHOLIOTA, STRO- 
PHARIA AND HYPHOLOMA IN THE RE¬ 
GION OF THE GREAT LAKES 
V 
Edward T. Harper 
Since publishing the species of Pholiota, Stropharia and 
Hypholoma in Vol. XVII of these Transactions I have se¬ 
cured photographs of a number of additional forms which 
are shown in the plates accompanying this article. They 
belong to the Pholiota dura-praecox, aegerita and curvipes 
groups, the Stropharia stercoraria-semiglobata group and 
the Hypholoma sublateritium, velutinum and appendicula- 
tum-candolleanum groups. I also give a photograph of 
Hypholoma hydrophilum which belongs to the Psilocybe 
spadicea group. 
These are good examples of the groups in the Agaricaceae 
and I take the opportunity to describe them more in detail 
and to explain the method of grouping I have followed and 
the names chosen for the groups. 
The agarics in this region fall naturally into groups. The 
forms in a group resemble each other closely but the groups 
are quite distinct. Most groups contain one or more common 
and wide spread species as well as rare and local forms. If 
we mention only those forms which have been named as 
species there are in the Pholiota dura-praecox group the 
common species Pholiota dura and Pholiota praecox and the 
rare Pholiota hoWeana, vermiflua, temnophylla, duroides, 
etc. In the Stropharia stercoraria-semiglobata group are 
the rare forms Stropharia umbonatescens, siccipes, siccipes 
var. radicata, etc. In the Hypholoma velutinum group are 
Hypholoma rugocephalum and Hypholoma boughtoni. 
In the Hypholoma appendiculatum-candolleanum group a 
wealth of forms have been named, among them Hypholoma 
