366 BOTANICAL GAZETTE [october 



PLATE XXVIII 



Dissophora decumbens 



Fig. 19. — Terminal portion of a fertile hypha in two parts, showing origin 

 and progressive development of sporangiophores ; A4. 



Fig. 20. — Portion of a fertile hypha bearing mature sporangiophores, in 

 w T hich septa have begun to appear; D4. 



Fig. 21. — Older portion of same bearing naked septate sporangiophores; 



D4. 



Fig. 22. — Termination of sporangiophore from w r hich sporangium hasdis- 



1m 



Fig. 23. — The same bearing a mature sporangium; water im. 12. 

 Fig. 24. — Sporangiospores; water im. 12. 

 Fig. 25. — Origin of fertile hypha from vegetative hypha; D4. 

 Fig. 26. — Terminal portion of fertile hypha showing origin of sporangio- 

 phores behind growing apex; D4. 



PLATE XXIX 



Haplosporangium bisporale 



Fig. 27. — Sporangiferous segments, small and of moderate length, bearing 

 sporangiophores or just budding to form them; D4. 



Fig. 28. — Small segments each giving rise to one or two sporangiophores 



and connected by slender isthmuses; D4. 



Figs. 29-32. Sporangiophores bearing one, two, or three one- or two- 

 spored sporangia; water im. 4. 



Fig. 33. — Mature bisporangium; w r ater im. 12. 



Fig. 34. — Two spores from a bisporangium still adherent; water im. 12. 



Fig. 35. — The same separated; water im. 12. 



Fig. 36. — Spore from monosporangium ; water im. 12. 



Haplosporangium decipiens 



Fig. 37. — Small segments bearing sporangiophores; water im. 4. 



Fig. 38. — Sporangiophores; water im. 4. 



Fig. 39. — Monosporangium with its single spore; water im. 12. 



