ANTHRACNOSE OF CUCURBITS. 15 
bit anthracnoses are caused by the same fungus. (4) The difficulty 
in distinguishing the genera Colletotrichum and Gloeosporium on the 
basis of the presence or absence of sete. (5) The morphological 
similarity of conidial stages of all anthracnose fungi and the necessity 
of knowing the perfect stages in order to make specific distinctions. 
(6) The question as to the validity of species erected upon the basis 
of host relationships. 
The evidence that the bean and cucumber anthracnoses are not 
identical has been augmented by numerous observations and cross 
inoculations made in the course of the present work, and there seems 
to be no further question as to the specific distinctness of the two. 
Several unsuccessful attempts have been made to cross inoculate 
with the causal organisms, and exposure of beans to natural infection 
has yielded only negative results. 
The fungus of cucurbit anthracnose shows quite constant and dis- 
tinctive cultural characters. The host relationships seem quite 
definite and check up with cultural and morphological characters. 
Upon the basis of host relationships as laid down by Edgerton (13), 
there seems to be no reason to doubt that there is one well-defined 
species of fungus causing the disease on the hosts listed. Since setze 
are present in all of the strains studied during the course of this work, 
it seems quite logical to retain until a perfect stage is discovered 
Halsted’s name Colletotrichum lagenarium, with the understanding 
that it holds for only one of the two fungi to which Halsted applied 
it. If, however, not much importance is attached to the presence 
or absence of sete, the earlier name Gloeosporvum lagenarium (Pass.) 
Sacc. and Roum. may be retained. It appears to be purely a 
matter of arbitrary choice between the two names. 
SYNONOMY. 
Colletotrichum lagenarium (Pass.) Ell. and Hals., 1893,in Bul. Torrey Bot. Club, v. 20, 
p- 246-250; or » 
Gloeosporium lagenarwum (Pass.) Sacc. and Roum., 1880, in Rev. Mycol., année 2, 
p. 200-202. 
Fusarium lagenarium Passerini, 1868, in Erbario Crittigamico Italiano, s. 2, no. 148. 
Gloeosporium reticulatum KRoumeguére, 1880, in Rev. Mycol., année 2, p.169-172. 
Colletotrichum oligochaetum Cavara, 1889, in Rey. Mycol., année 11, p. 191. 
RELATIONSHIP UNCERTAIN. 
Gloeosporium orbiculare Berkeley, 1876. ; 
Gloeosporium cucurbitarum Berkeley and Broome, 1882. 
Volutella citrulli Stoneman, 1898. 
MORPHOLOGY AND CULTURAL CHARACTERS. 
MORPHOLOGY. 
The morphology of this fungus has been described rather com- 
pletely by various workers, such as Roumeguére (41), Cavara (8), 
