412 Wisconsin Academy of Sciences , Arts, and Letters. 
Spores echinulate apiculate 6—8x10 —12 y. Plants brown, 
tawny. 
Matted fibrous...H. velutinum, vol. XVII, pi. LXXIX. 
Innate fibrous, cracking.. .H. boughtoni. PL XXI, ABC. 
Rugose and viscid.H. rugocephalum. PI. XX. 
Hypholoma pyrotrichum is a fiery tawny plant belonging 
to the second group and Hypholoma regidipes is a small 
form with scaly pileus related by its spores to the second 
group. 
Note. Prof. R. Maire in the Bull. Soc. Myc. de France, Tome 
XXVII, fas. 4, discusses the relation between Hypholoma la- 
crimabundum and Hypholoma velutinum in Europe. The two 
species have been much confused. According to Maire Hypho¬ 
loma velutinum is the most common species. It was described 
by Persoon. Bulliard t. 194 and T25 figured it under the name 
Agaricus lacrimabundus. True Hypholoma lacrimabundum is 
illustrated by Fries. Icon. 134 which he wrongly connected with 
one of Bulliard’s figures. The species has been described several 
times under different names. Hypholoma storea var. caespitosum 
Cke. Hypholoma hypoxanthum Phill. and Plow. Geophila cotonea 
Quel, belong to this species. The two species are distinguished as 
follows. Hypholoma lacrimabundum grows usually in tufts by 
stumps or roots, the pileus is scaly on a whitish background, the 
lamellae are not clouded and more rarely weeping and the. spores 
are smooth 3—5X6—9 /jl without an apical pore. Hypholoma 
velutinum grows singly or in groups on humus, the pileus is fibrous, 
ochraceous or tawny, the lamellae are clouded and often weeping, 
the spores are 6—7X10—12//, strongly verrucose and with an 
apical pore covered with a hyaline papilla. 
The difference is practically the same as that between the two 
groups in this region. The essential distinction is in the spores. 
The spores of my specimens of Hypholoma lacrimabundum agree 
with those of Hypholoma storea var. caespitosum in Jaap’s 
exsiccati, 143, except that they average slightly larger 3—5X7—9 /jl 
instead of 4—4.5X7.5—8/z . Not as large however as the spores 
of Hypholoma hypoxanthum 4—5X9—11//. 
The European confusion of the two species has extended to 
this country and forms of Hypholoma velutinum have no doubt 
been referred to Hypholoma lacrimabundum. Maire rightly 
questions Hard’s figs. 263 and 264 which have the appearance of 
Hypholoma velutinum. Atkinson’s fig. 28 is more like Hypho¬ 
loma lacrimabundum though the large spores 7—8X9—11 make 
it doubtful. The spores of the plant illustrated in Vol. XVII 
pi. LXXVII C were smooth and 4—5X7—8//. On p. 1153 I 
gave the spores of Hypholoma lacrimabundum 5—6X8—10/z 
following Sylloge, Peck, Quelet etc. Maire says the spores of 
