902 



AQUATIC PHYCOMYCETES 



variable in size, 70-250 u, long by 33-75 \x in greatest diameter, smooth- 

 walled or with 1-8 slender spines irregularly disposed around the con- 

 spicuous apical discharge papilla; zoospores of the secondary, biflagel- 

 late type, 8-15 [ji long by 6-10 u. wide, contents bearing numerous small 

 refractive globules, the spores first emerged surrounded by a delicate 

 quickly evanescent vesicle; resting spores brownish, borne like the spo- 

 rangia, the outer wall of the container either wholly or in its upper part 

 beset with numerous delicate spines 14-30 u, long, germination not 

 observed. 



Saprophytic on decaying rosaceous fruits, Kanouse (he. cit.), Spar- 

 row and Cutter (1941 : figs. A-H), coll. E. A. Bessey (S.), and M. 



Fig. 72. Mindeniella spinospora Kanouse 



A. Tip of plant showing enlarged apex of basal cell from which pedicellate 

 zoosporangia arise directly. B. Spiny sporangium. C. Zoospore. D. Another 

 type of spiny sporangium. E. Immature resting spore (?). F. Tip of plant 

 bearing zoosporangia and resting spores. 



(A-C, E, after Sparrow and Cutter, 1941; F, Kanouse, 1927) 



