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A. W. BLIZZARD 
ment were collected, August and September, 1915, near Seventh Lake, 
Adirondacks, N. Y. One species, Clitocybe adirondackensis, was 
collected late in September of the same year in Coy Glen, near Ithaca, 
N. Y. 
Omphalia chrysophylla was found growing on a coniferous log which 
was not very far along in decay. The season being unusually wet, 
quite sufficient moisture was present, which produced a very luxuriant 
growth. The cells and structure of this species stand out with unusual 
clearness, due, very likely, to the firmness of the cell walls. 
Clitocybe adirondackensis was found growing gregariously among 
leaves on a steep hillside under coniferous trees. The whitish myce- 
lium growing through and among the decaying leaves, spread over a 
space equal to about three square feet. 
Clitocybe cerussata was growing in leaf-mold under coniferous trees. 
The mycelium was very abundant and spread in all directions. 
Clitopilus noveboracensis was growing in leaf-mold in a mixed forest. 
Its habit is gregarious. The white mycelium in forms of hyphal 
strands permeated the substratum, covering an area equal to about 
four feet square. 
The basidiocarps were fixed immediately in Carnoy's fluid, cleared 
in cedar oil, embedded and sectioned in paraffine. 
Omphalia chrysophylla Fries 
Basidiocarp Primordium. — The youngest stages obtained of this 
species were small, elongate bodies, averaging 50/^ in diameter and jSoijl 
in length (Fig. i). They are larger at the base and gradually taper to a 
blunt point at the apex. At this stage of development they consist of 
a homogeneous weft of slender threads, measuring 3.5)U in diameter. 
Their general direction is parallel with the axis of the young fruit body. 
The number of hyphae is increased by branching which takes place 
more abundantly toward the base in the young basidiocarp. The 
more peripheral hyphae end on the surface at varying distances from 
the tip, while central ones converge at the apex (Fig. 18), thus giving 
to the young fruit body its slender form. 
Stipe Primordium.- — ^The stipe primordium develops by continued 
growth of the hyphae that compose the undifferentiated basidiocarp 
and is not differentiated as such, until the origin of the pileus primor- 
dium; even then there is no definite line separating it from the pileus 
(Fig. 3)- 
