News, Notes, and Reviews 
171 
of the studies made there by Elias Fries in the early years of his 
life. 
Shear’s Studies of Parasitic Species of Glomerella 
“ Studies of the fungous Parasites belonging to the genus Glom- 
erella’’ by Dr. C. L. Shear, appears as Bulletin 252 of the Bureau 
of Plant Industry of the United States Department of Agricul- 
ture. The name Glomerella is the generic name applied to the 
ascogenous stage of Gloeosporiiim or Colletotrichum, which 
attacks various kinds of plants giving rise to a variety of diseases. 
The object of the paper as set forth by its author is to deter- 
mine the life histories, habits and identity or relationship of the 
forms of Gloeosporiiim or Colletotrichum found on the same or 
different hosts. The paper covers the investigations of members 
of this group of organisms obtained from 45 host plants. Of 
the 473 species of Gloeosporium and Colletotrichum given by 
Saccardo not including members of the genus included by Sac- 
cardo under other generic names, it is estimated by Shear that 
about 50 per cent, of these so-called species cannot be deter- 
mined except on the basis of host relations or the part of the 
host attacked. 
The life history of forms from 36 different hosts plants have 
been determined and recorded in this paper, 17 having been pro- 
duced in pure culture and 19 on the host either in moist chamber 
or under natural conditions. All of the material from the 36 
hosts is referred to three species, G. cingulata, G. Gossypii, and 
G. lindemuthianum, the first occurring on 34 hosts and the remain- 
ing two on one host each. 
None of the morphological or physiological characters in the 
genus seem to be well fixed, the conidia, chlamydospores, peri- 
thecia, ascospores, and paraphyses showing a wide range of vari- 
ation. Most forms do not seem to be restricted to any particular 
host. 
The question is raised as to why the life cycle of Glomerella 
and other pyrenomycetes is sometimes completed in pure culture 
while at other times only conidia or pycnospores or no fructi- 
fication of any kind is found. Various views on this subject have 
been summarized but the question is still an open one for Glom- 
