3io 
NEW YORK STATE MUSEUM 
manent than the upper. The cap is more highly colored when 
young and is apt to become paler with age, but the margin does not 
become paler than the central part as it so often does in the edible 
Boletus. Individuals sometimes occur in which the stem is nearly 
cylindric and reticulated only on the upper part. These connect 
so closely with the edible Boletus that we have considered this to be 
a mere variety of it. In size and in edible qualities it is very similar 
to that species. 
Hydnum albidum Pk. 
Whitish Hydnum 
Plate 56, fig . 1-7. 
Pileus fleshy, thin, broadly convex or nearly plane, subpruinose, 
white, flesh white; aculei short, white; stem short, solid, central or 
eccentric, white; spores subglobose, .00016 to .0002 in. broad. 
The whitish Hydnum .is uniformly colored in all its parts. It grows 
in groups or in clusters. In the latter case the caps are sometimes 
irregular because of the crowded mode of growth and the stems are 
occasionally eccentric. It is a small species not liable to be mistaken 
for any other except possibly for very small pale forms of the spread¬ 
ing Hydnum. But wholly white examples of this species have never 
been seen by me. 
The caps are 1 to 2 in. broad and the stems are generally about 
1 in. long and 3 to 5 lines thick. 
The plants grow in thin woods or in open bushy places and appear 
in June and July. It is not a common species and though well 
flavored it is not of very great importance as an edible mushroom 
because of its scarcity and small size. 
Hydnum Caput-ursi Fr. 
Bear’s-head Hydnum 
Plate 56, fig . 8-12. 
Fleshy, tuberculiform, immarginate, pendulous, white, the surface 
everywhere emitting short branches which are clothed with branch- 
lets and subulate deflexed aculei; spores globose or subglobose, 
.0002 to .00024 in. broad. 
