BLASTOCLADIALES 



661 



Fig. 45. Blastocladiella 



A-D. Blastocladiella stubenti Couch and Whiffen: A, mature sporangium 

 with two discharge papillae; rhizoids beneath plant not shown; B-D, cyto- 

 logical preparations of swarmers, B, two recently fused isogamous gametes, 

 C, a zygote, and D, a zoospore showing lateral body as well as nuclear cap. 

 E-G. Blastocladiella simplex Matthews: E, small plant with discharging 

 sporangium; E, single zoospore (drawn freehand); G, plant bearing resting 

 spore. H-L Blastocladiella stomophilum (Couch and Cox) Couch and Whiffen : 

 H, basal cell and sporangium; /, zoospore. 



(A-D, Stuben, 1939; E-G, Sparrow, 1943; H-l, Cox, 1939). 



