1890. | FAIRMAN—FUNGI OF WESTERN NEW YORK. "45 
In the fungus flora of Orleans county, so far as known, the Hymeno- 
mycetes, or mushrooms and their allies, head the list with the greatest 
number of species, viz: 96, or nearly one-fourth the number of recorded 
species. The Pyrenomycetes come next with 86 species. The 
Hymenomycetes, being mostly of large size, were collected rapidly at 
first, while members of the other orders, for the most part microscopic, 
were overlooked. Lately, however, the Pyrenomycetes are coming to 
the front and will, doubtless, greatly outnumber the other fungi when 
our mycologic flora has been thoroughly investigated. The lst of 
fungi found in Orleans county includes forms new to the state or, at 
least, not enumerated in the reports of Prof. C. H. Peck, and several 
new species and varieties which are set forth at the conclusion of this 
article. (One of the rarer forms is Pleospora subsulcata, E and E. 
See plate 4, fig. 1 and 2.) 
All of the families into which Prof. Saccardo divides the Pyreno- 
mycetes are represented in the mycologic flora of Orleans county 
except one (the Microthyriacee). Nearly forty (40) genera are found 
in the list of black fungi, the common genera, Valsa, Hypoxylon, Eutypa, 
Rosellinia, Piatrype and Diaporthe, having the greatest number of species 
to their credit. The “black fungi” previously mentioned belong to 
the saprophytes and exist on dead and decaying substances. 
We now turn to consider some species of Pyrenomycetes which are 
parasitic on living plants, the mildews or Perisporiacez, the first 
family of Pyrenomycetes in the Sy//oge Fungorum. Since the publication 
of Vol. I of Saccardo’s Sylloge, there has been published a paper on the 
“‘ Mildews of Illinois,” by Dr Burrill, which reduces many species of 
the former work to synonyms. Our mildews (Orleans county) by the 
arrangement adopted by Peck in his reports, or by Saccardo in the 
Sylloge, are 19 in number, and by the revision of Burrill became 
‘reduced to 14 species. Among the host plants in Western New 
York attacked by mildew, we find cherry, horsechestnut, grape, lilac, 
honeysuckle, phlox, violet, larkspur, woodbine, aster, viburnum, elder, 
elm, beech, maple and gooseberry. The mildew on Agrvimonia eupatorta 
(which has heretofore been referred to Spherotheca Castagnei, Lev.) is 
called by Burrill Spherotheca Humuli, (D.C.). Lyndonville specimens of 
a Spherotheca on common agrimony show perithecia larger, appendages 
shorter and more delicate, ascus and spores larger than the common 5S. 
Castagnet. Therefore Spherotheca Humuli (D. C.), Burrill, seems an 
appropriate name for our species (Plate 3, fig. 6). 
The Sphzropsidee have sixty (60) representatives which are 
distributed in many genera, the principal ones being Seféoréa, with 13 
