STUDIES IN NORTH AMERICAN PERONO- 
SPORALES— VI. NOTES ON MISCEL- 
LANEOUS SPECIES 
Guy West Wilson 
(With Plates 135 and 136, Containing 22 Figures) 
Kawakamia Miyabe ; Miyabe & Kawak. Bot. Mag. 
Tokyo 17: (306). 1903 
This genus was established for the Cyperus-'mhahitmg species, 
Peronospora Cyperi. This fungus which is a native of Japan has 
been collected once at Pierce, Texas, on imported plants of its 
host, Cyperus tegetiformis Roxb. According to its author the 
genus is closely related to Phytophthora. Through the courtesy 
of Mrs. Flora W. Patterson the writer was enabled to make a 
careful study of both American and Japanese material of the spe- 
cies in the herbarium of the Bureau of Plant Industry. While 
the measurements of the American specimens are slightly larger 
than those of the Japanese, there is no question as to their iden- 
tity. The conidia present a striking likeness in outline to those 
of Phytophthora, but the pedicel is more conspicuous than in any 
species of this last genus. 
The genus Kawakamia appears to the present writer to agree 
more closely with Basidiophora. In Basidiophora the conidio- 
phore is much enlarged at the apex, and bears a number of cylin- 
dric branches on each of which a large, oval, papillate is produced. 
This conidium breaks away with a portion of the so-called basidial 
branch adhering as a pedicel-cell much as in the case of the telio- 
spores of the Uredinales. In Kawakamia the conidiophore is 
somewhat different, but strikingly similar. The conidiophore is 
simple and bears a single conidium on a portion of the conidio- 
phore which is differentiated from the remainder of the hypha 
both in size and structure. In appearance and structure the fertile 
portions of the conidiophores both of Basidiophora and of Kawa- 
kamia are similar. In each genus the conidia fall away with the 
pedicel-cell attached. As these characters are so similar in the 
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