1154 Wisconsin Academy of Sciences, Arts, and Letters . 
in Sylloge they are not quite so broad and not said to be rough. 
M'assee’s figure of Hypholoma pyrotrichum Fr. also shows the 
same broad rough warty spores though they are dark brown in 
the illustration rather than blackish. 
But while the spores show remarkable agreement these four 
species vary in color and surface of the pileus. 'Hypholoma 
velutinum has a thick matted fibrous universal veil as in PL 
LXXIX and Cooke’s Illus. 563 and is lurid or tawny brown. Hy¬ 
pholoma pyrotrichum has the same kind of veil but is bright 
fiery tawny as shown in Cooke’s Illus. 564. Atkinson describes 
the pileus of Hypholoma rugocepholum as smooth, not hairg 
or scaly, slightly viscid and marked by strong radiating wrinkles. 
Peck says the pileus of Hypholoma boughtoni is glabrous or 
slightly fibrillose often concentrically or areolately cracking. 
Prof. IL A. Harper who has examined many of Peck’s type 
specimens of Hypholoma for me reports that the dried speci¬ 
mens of Hypholoma buoghtoni are the same as those of Hypho¬ 
loma rugocephalum. He says “the spores are broad, rough, 
black and apieulate and the specimens are the same in external 
appearance.” 
The illustrations of the different plants show the different ex¬ 
ternal characters as described. The spores are so diagnostic 
however that care should be taken by observers to see if the 
differences are not due to age or weather conditions. 
NOTE. Forms with different spore characters have been associated 
with this group and we mention them here though they probably be¬ 
long to another group. 
Hypholoma velutinum var. leiocephalum B. & Br. is said to be a 
smaller plant growing coespitose on stumps with a smooth ragged 
pileus. Dodge says specimens so labelled in Massee’s collection have 
spores entirely different. It has not been reported from this country. 
Hypholoma delineatum Pk. is placed in this group by the author who 
says “It has the general appearance of Hypholoma rugocephalum but 
differs in the narrow, obtuse and smooth spores and broader flask 
shaped cystidia. 
Hypholoma velutinum Pers. PI. 
The plants illustrated in PL LXXIX grew on the ground 
near a stump in a. pasture at Geneseo, Ills. They agree with 
the description of Hypholoma velutinuml, having a universal 
veil of matted fibers, an hygrophanous lurid pileus becoming 
