94 BOTANICAL GAZETTE [ AUGUST 
Volutella citrulli, n. sp. (figs. 2¢-25, So—S2); an anthrac- 
nose of the citron. 
From the Ithaca markets an anthracnosed citron was 
obtained. It was marked by light brown, subcircular, confluent 
patches thickly covered with black acervuli, from which the 
conidia oozed forth in light pink masses. In some of the spo- 
rodochia sete were present, while in others they were wanting. 
The conidia are hyaline, single-celled, elliptical or clavate, 
sometimes slightly curved, 15-20X 3-4. From the general 
macroscopic characters, and the shape and size of the conidia, 
as well as from the nature of the host, the fungus was at first 
referred to Colletotrichum lagenarium (Pass.) E. & H. Further 
study, however, revealed quite a marked difference in the two 
species. 
The pustule of the citron anthracnose has its inception in a 
dense stroma just beneath the epidermis, but it extends some 
distance above the surface of the host. In some cases the 
stroma extends up around the basidia, almost forming a cove! 
ing as is found in the genus Vermicularia. Long basidia arise 
above the stroma; the elevated basidia and the marginal sete, 
when sete are present, would show a close relationship to the 
genus Volutella. The sete are colored, two to three times 
septate, with a swollen base. 
This species develops quite differently from that of the beam, 
or watermelon anthracnose in artificial cultures. In colonies 
the salmon colored pigment of Col. lagenarium is wanting, and 
the fruiting pustules are not so centrally located, but appear ® — 
light colored pustules more or less separated from each other 
and somewhat concentrically disposed. A stroma, instead of 
being centrally located as in the two previously under consider 
ation, appears in clusters of peculiarly contorted sclerotoid 
bodies terminating in club-shaped cells. These masses f° — 
formed in concentric rings, intermingled with the fruiting Por 
tions. The mycelial growth radiates in quite straight rays from 
the center to the margin. The growth on bean stems also PF 
sents a different aspect from Col. lagenarium, just mentioned 
