CONTROL OF DECAY IN PULP AND PULP WOOD 57 
round brown spots, very commonly found, a species of Alternaria 
has been isolated consistently. Not all such spots, however, are 
produced by the same fungus. 
Several of the molds commonly inhabiting pulp produce no pig- 
ment, have a colorless mycelia, and so are evident only when they 
sporulate. Among these were identified species of Gliocladium, 
Penicillium, Citromyces, Trichoderma, Aspergillus, and Mucor. 
Brown blotches are produced by several species of molds and by 
some hymenomycetes. Generally speaking, the hymenomycetes 
produce areas of some shade of brown, varying from a faint pinkish 
cinnamon to a brown-black, though some produce cream-colored or 
bleached areas. The areas of pulp infected with hymenomycetes 
may be very weak. They may be much thinner than the surround- 
ing portions of the pulp oftentimes falling out entirely when the pulp 
is moved. 
Many of the cultures have not as yet been identified. Those 
isolated from pulp and water are listed as follows: 
Pliy corny cetes 
Mucoraceae 
Mucor plumbeus Bon. 
Mucor racemosus Fres. 
BMzopus nigricans Ehrenb. 
Ascomycetes 
Pezizaceae 
Peziza repanda Wahl. 1 
MoUisiaceae 
Orbilia rubella Pers. 1 
Sphaeriaceae 
Chaetomium globosum Kunze 1 
Chaetomium funicolum Cooke 1 - 
Basidiomy cetes 
Hymenomycetes 
Agaricaceae 
Paxillus panuoides Fr. 
15 unidentified cultures, discussed hereinafter. 
Fungi imperfecti 
Sphaerioidaceae 
Cytosphora sp. 
Mucedinaceae 
Torulopsis rosea Berl. 
Oidium sp. 
Papulospora nigra Hotson 
Trichoderma spp. (11 cultures) 
Aspergillus niger van Tiegh 
Aspergillus fumigatus Fres. (2 cultures) 1 
Aspergillus flayus group (2 cultures) 1 
Penicillium pinophilum Hedge. 1 
Penicillium purpurogenum O. Stoll 1 
Penicillium orevicaule series x 
Penicillium commune Thorn x 
Penicillium spp. (13 cultures) 
Citromyces spp. (2 cultures) 1 
i Ackno^svledgment— The late Dr. E. J. Durand and Drs. A. H. drivers, Charles Thorn, and Mar- 
garet B. Church rendered aid in identifying these fungi. 
