Harper—Species of Hypholoma . 
1157 
chief diagnostic mark of the species. All other species in the 
group have the gills whitish at first. The stem is smooth and 
white, sometimes slightly floccose like the pileus, equal and fistu- 
lose. It is striate at the apex as in A and this is the second diag¬ 
nostic mark of this species. The spores are elliptical, dark brown* 
4—5x8—9 /a. The two marks by which the species is known 
are the gill color and striate apex of the stem. The plant does 
not appear to be well known. A tkinson mentions it very briefly 
and Peek reports it as rare in Hew York State. He is also 
doubtful about the color of the young gills and says the Europ¬ 
ean illustrations do not show them violaceous. It would appear 
however that Cooke’s Illust. 546 is intended to represent them 
so as contrasted with the white gills in PI. 547. The color of 
the young gills should be carefully noted by collectors and the 
distribution of the plants recorded. 
Hypholoma appendiculatum Bull. 
Hypholoma appendiculatum Bull, is the most common species 
in the group. It occurs everywhere, in lawns and pastures, on 
or near logs, stumps and buried roots. The species is dis¬ 
tinguished from Hypholoma candolleanum by the gills being 
whitish when young, becoming flesh colored and finally purplish 
brown. The stem also is more floccose and less striate at the 
apex though Hypholoma appendiculatum often has the apex of 
the stem somewhat striate. 
The exact relation of our plants to those of Europe is some¬ 
what uncertain. Atkinson, Mushrooms p. 27, and Murrill, 
Mycologia Jan., 1912, consider them the same species. Prof. 
Farlow, than whom there is no better authority, in a letter to 
me takes the same view. Peck separates the pale yellowish or 
whitish forms found scattered on lawns and makes them a new 
species. Ten of the collections at Albany are named Hypholoma 
incertum and only two Hypholoma appendiculatum, both of 
which are doubtful. The plants in our region vary much. 
Some are nearly white or pale yellow, others are deep hygroph- 
anous brown. Some are very caespitose and others single or 
scattered. I All the forms run together however. The pure 
