148 THE POLYPORACEAE OF WISCONSIN. 



Pileus 8 to 20 cm. broad ; stem 2.5 to 7.5 cm. long, 12.6 to 25.2 mm. 

 thick. Low ravines and sandy places. 



The first description that Professor Peck gave of the species was 

 founded upon a single dried specimen sent to him by Professor William 

 Trelease. It was found by a student of the University of Wisconsin. 



Peck adds also the following : ' ' This species has two chief character- 

 istics . First, the volva-like annulus at the base of the stem. It 



appears in the dried specimen like a volva making a cup -like annulus. 

 Still it may be a thick, peronate sheathing veil, but it is different than 

 that of other species of Boleti known to me. Second, the spores are al- 

 most globular, while in other Boleti they are fusiform or spindle- 

 shaped." 



In all the specimens that I have seen the veil partly adheres to the 

 margin. The spores have a pale greenish-yellow color by transmitted 

 light, and a rich yellow or dark-yellow by reflected light. When cut 

 the flesh changes only slightly to a sort of purple. "Cream-yellow" 

 when young and ' ' reddish-brown ' ' when old or dry give a good idea of 

 the color. 



The stem varies in length from 3 to 6 cm. and may be 2 cm. or more 

 thick, but it shrinks to less than one-half in drying. Both stem and 

 pileus may be said to be fleshy-tough. When dry the specimens have a 

 very agreeable sweet odor. 



Specimens are collected every year at Madison, and they have also 

 been found at Lake Wingra, Horicon and Blue Mounds. One specimen 

 was found at Horicon, growing in rich soil on the banks of the Rock 

 river, in July 1899, and another was found by F. E. McKenna near 

 Blanchardville. The species is apparently common in the state. 



The description given by Saccardo is about the same as that first 

 given by Peck and is necessarily incomplete. The species seems to have 

 no close allies in the genus. The thick glutinous veil enclosing the en- 

 tire plant like a volva is a most striking characteristic, and the globose 

 spores are also very distinctive. 



