26 



Mycologia 



papilla but occasionally from other part much branched, 4-10 /a 

 across, often terminated by acrogenous secondary spore of the 

 shape of conidia, otherwise a globe, which germinates with germ 

 tube or produces zoospores on germination ; chlamydospores 

 formed in the host tissue at ends of endogenous hyphae, seldom 

 formed on conidiophores, globose, ochraceous, 15-49^, commonly 

 40-45 fx, wall at first thin, later thickened to measure 2 jx across : 

 oogonia and oospore yet unknown. 



On Ficus Carica, causing white-rot (Shiro-kusare in Japanese) 

 of fruits. 



Type localities : Komaba, Tokyo, College of Agriculture 

 grounds, on "White Genoa," Sept. 1909, S. Kawagoe & K. <Hara 

 (ex Hara) ; Gumma-ken Agricultural Experiment Station 

 grounds, on "Black California," Sept. 1915 (ex Hori). 



Distribution: Taiwan (Formosa), also occurring on "Black 

 California" (ex Sawada). 



Hara states (in Kwaju Byogairon p. 432) the disease com- 

 mences in August or September. The fruit becomes darker in 

 color and water-logged in appearance and is followed by imme- 

 diate liquefaction and decay. The affection is at first limited to a 

 small sunken area, but soon spreads over the entire fruit, devel- 

 oping in a few days a thick cottony cover of mycelium on its 

 surface. A disagreeable odor usually accompanies the decay. 

 The surface of rotten fruits remaining on the twig is white and 

 longitudinally wrinkled in the dried condition. 



Illustrations: Hara's Kwaju Byogairon (p. 433) gives 8 wood- 

 cut figures illustrating the details of the fungus. 



Notes: According to Hara's point of view, the genus Kawa- 

 kamia ought to have its conidiophores unbranched or at least not 

 branching immediately below the conidia (Hara '18 p. 22. See 

 above). This distinction, however, is very uncertain and unre- 

 liable, as irregular branching of conidiophores is often observed 

 in well established species of Phytophthora, e. g. P. omnivora. 

 Sawada, dwelling upon Kawakamia Cyperi (Publication no. 102 

 of Agric. Exp. Stat., Taiwan, p. 10-18. June, 1916), rightly 

 pointed out that the most important difference of Kawakamia 

 from Phytophthora consists in having (1) well-developed haus- 

 toria and (2) its antheridia not tightly surrounding the oogonial 



