276 
Journal of Agricultural Research 
Vol. VIII, No. 7 
(35) Ward, H. M. 
1883. Observations on the genus Pythium (Pringsh.). In Quart. Jour. Micros. 
Sci., n. s. v. 23, no. 92, p. 485-515, pi. 33-36. 
(36) Wilson, G. W. 
1907. Studies in North American Peronosporales—II. Phytophthoreae and 
Rhysotheceae. In Bui. Torrey Bot. Club, v. 34, no. 8, p. 387-416. 
( 37 ) - 
1914. Studies in North American Peronosporales. V. A review of the genus 
Phytophthora. In Mycologia, v. 6, no. 2, p. 54-83, pi. 119. Bibliog¬ 
raphy, p. 80-82. 
PLATE 71 
A. —Mycelium of P. syringae grown on potato agar. Note the tuberculate appear¬ 
ance of the mycelium. X320. 
B. —Mycelium of P. syringae grown on oat agar. This is the general appearance of 
the mycelia of the other forms when grown on this medium. X320. 
