PERONOSPORALES 



1055 



Shen and Siang (1948), on the basis of the character of the nonsexual 

 stage, place this species in synonymy with Phytophthora megasperma. 



Phytophthora cryptogea Pethybridge and Lafferty 



Pioc. Royal Dublin Soc. (N.S.), 15: 498, pis. 45-47. 1919 



(Fig. 90 G-l, p. 1059) 



Mycelium intra- and intercellular, composed of branched hyphae 

 which may become septate in empty parts, sometimes bearing lobu- 



H 



Fig. 89. Pythiaceae 



A-C, Phytophthora megasperma Drechsler: A-B, proliferous zoosporangia; 

 C, sex organs. D-G, Phytophthora gonapodyides (H. E. Petersen) Buisman: 

 D-E, sex organs; F, proliferous zoosporangia; G, fully formed zoospores 

 emerging from a zoosporangium. H. Diasporangium jonesianum Hohnk, part 

 of plant showing whorls of zoosporangia. 



{A-C, Drechsler, 1931; D, Cejp, 1933b; E-G, Kanouse, 1925; //, Hohnk, 

 1936) 



