MIVABE & TAKAHASHI: PEROXOPLASMOPARA HUMULI. r -, 



2. Perouoplasmopai'a Celtidis Waite) Clinr. 



S\"ii. PcroJiospora Celtidis W'aitc. 



Plasmopara Celtidis Berl. 

 Hosts and Distrib. On Ccltis sinensis Pers. 

 Honshu. Prov. Echigo : Fukudo-mura. K. Yoshino, Oct, lo, 1903. 



3. Peronoplasmopara Humiili Myb. et Tak. n. sp. 



Spots, small, irregular, limited by nerves, scattered or confluent forming large 

 irregular patches, at first \ello\vish, then brownish Conidiophores 2-5 from a 

 stoma, 200-460// long, 6-7 /i wide, 5-6 times dichotomous, rather spreading ; the 

 first branch at about 2/3 to 3 4 from the base; the ultimate branches straight, slight- 

 ly arcuate or sometimes deflexed, tapering to a blunt point. Conidia, broad ellip- 

 tical or obovate, 22-26 p. x 1 5-18 «, of light smok\- color, with blunt apical papilla, 

 and germinating by zoospores. Oospores, spherical, smooth, 25-40 n in diameter, 

 and light brownish. 



Hosts and Distrib. On the leaves oi Humulus Liipiilus L. , cult . 



Hokkaido. Prov. Ishikari : at the experimental fields of the Hokkaido Agricul- 

 tural Experiment Station, Sapporo, Y. Takahashi, Jul\-, 3, 1905 ; K. Miyabe, July 

 29. 1905. Hop-fields belonging to the Sapporo Brewery Company, Sapporo, K. 

 Miyabe, June 15, 1906. 



On Hnnuuus Litpulus L. var. eordifolius ]\Iaxim. (wild). 



Hokkaido. Prov. Shmbeshi, at Zenibako. J. Hanzawa, Aug. 1905. 



Honshu. Prov. Riküchü, at Morioka, G. Yamada, July 1905. 



Dec. 20, 1906. 



i^ ^ U Vi -C .t ^ -^ y {Humulus Lupulns L.) V ^'^ t Z> MWi ^^^ n. t^ 

 ^j §' n i" ^j ^c ;2 ^ n ;^ ^ ife t 6 ß s <Peronosporaccae) ^^ 6 r M t^-fo 



m^ ^ n. 3C :k Ü :i: ^ iS i" ft +L il^ 5 ig ^ =^ '-^ y' M r^ f/i X ^^ :^ ^:t 



nij^^m'^^m^^m 'p ^ 'r. h ^^ ^^ b ^^o m t- f^ ± ^ ^ >'b) ^ ^ d^ ^ 



