3 1 8 



AQUATIC PHYCOMYCETES 



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Fig. 19. Phlyctidiaceae 



A-B. Phlyctidium anatropum (Braun) Rabenhorst: A, groups of sporangia 

 on Stigeoclonium; B, single upright sporangium on surface of host. C-E. 

 Dangeardia mammillata B. Schroder on Pandorina: C, strongly apiculate spo- 

 rangium with its bushy rhizoids resting on surface of a cell of a colony; D, 

 discharging sporangium with upper part protruding from surface of gelati- 

 nous sheath of algal colony; E, spiny resting spore within (?) host cell; cyst and 



