408 Wisconsin Academy of Sciences, Arts, and Letters. 
THE HYPHOLOMA SUBLATERITIUM GROUP 
The “brick tops” form a characteristic group of agarics 
composed of a number of closely related forms. The relation 
of the forms to each other and the geographical distribu¬ 
tion was discussed in vol. XVII, pp. 1146-1147 and illus¬ 
trations of four forms were given. 
Beautiful specimens of the squamose variety of Hypjiol- 
oma sublateritium were found by an oak stump in woods at 
Geneseo, Ills., in September, 1915. They are shown in pi. 
XIX. The pilei were conspicuously spotted with dark op¬ 
pressed scales arranged in concentric rows giving the plants 
a striking appearance quite unlike that of the ordinary form 
of the species. The scales were due to the persistence of the 
universal veil on the pileus. The variety has been illustrated 
by Cooke, Illus. 558. 
SYNOPSIS OF THE FORMS ILLUSTRATED 
Hypholoma sublateritium. Typical form. 
Vol. XVII, pi. LXXII. 
Pileus squamose. Var. squamulosum.PI. XIX. 
Stems long and slender, etc., H. perplexum. 
Vol. XVII, pi. LXXIII. 
Hypholoma capnoides. Typical form. 
Vol. XVII, pi. LXXIV. 
Hypholoma fasciculare. (Form from the Pacific Coast.) 
Stems short, thick at the base. Var. robustior. 
Vol. XVII, pi. LXXV. 
All these forms are reported in Europe except Hypholoma 
perplexum. Of the other European forms in the group Hy¬ 
pholoma elaeodes is a variety of Hypholoma fasculare and 
should be found with that species on the Pacific coast. 
The two varieties of Hypholoma sublateritium, var. sub- 
solitarium which is less caespitose, the pileus uniformly 
colored and the stipes thickened at the base, and var. 
Schaefferi with a yellow rugose pileus, hollow stem and nar¬ 
row decurrent lamellae, should be looked for in this region. 
The occurrence of Hypholoma epixanthum in this country is 
doubtful as noted in the article in Vol. XVII, p. 1147. 
