1. Rhizophydium granulosporum Scherffel (Chytridiales)
        Sporangia on a moribund filament of Oedogonium sp. (X 256)

  2. Rhizophydium granulosporum Scherffel (Chytridiales)
        Empty sporangia on Spirogyra; note the delicate rhizoids (X 256)

  3. Rhizophydium graminis Ledingham (Chytridiales)
        Mature and empty sporangia on a root hair of wheat;
        note the delicate rhizoids inside the root hair (X 256)

  4. Chytriomyces poculatus Willoughby & Townley (Chytridiales)
        Sporangia growing on pine pollen (X 160)

  5. Chytriomyces poculatus Willoughby & Townley (Chytridiales)
        Empty sporangium n pine pollen; note the operculum at the orifice (X 160)

  6. Blyttiomyces helicus Sparrow & Barr (Chytridiales)
        Empty sporangium on pine pollen from side view; note helical bands (X 160)

  7. Blyttiomyces helicus Sparrow & Barr (Chytridiales)
        Empty sporangium on pine pollen from face-on view of orifice;
        note helical bands (X 160)

  8. Chytridium confervae (Wille) Minden (Chytridiales). A series illustrating
       zoospore discharge. The zoospores are released into an evanescent,
       membrane-less vesicle. The operculum is exposed to the right of the orifice
       in the last slide. (A series of four slides, all at X 256.)
      Slide 8a
      Slide 8b
      Slide 8c
      Slide 8d

  9. Nowakowskiella elegans (Nowak.) Schroeter (Chytridiales)
        Mature sporangia (X 160)

10. Olpidium brassicae (Wor.) Dang. (Spizellomycetales?)
        Sporangia, some with discharge tubes, inside root cells (X 160)

11. Olpidium brassicae (Wor.) Dang. (Spizellomycetales?)
        Stellate resting spores inside root cells (X 160)

12. Olpidium brassicae (Wor.) Dang. (Spizellomycetales?)
        Globose, uniflagellated zoospores (X 400)

13. Entophyctis variabilis Powell & Koch (Spizellomycetales?)
        Sporangia inside pollen grains (X 256)

14. Spizellomyces pseudodichotomus Barr (Spizellomycetales)
        Sporangia inside pollen grains (X 256)

15. Spizellomyces punctatus (Koch) Barr (Spizellomycetales)
        Sporangium with rhizoid system growing in broth culture (X 160)

16. Piromyces communis Gold (Spizellomycetales)
        A rumen fungus growing in culture on filter paper (X 64)

17. Piromyces communis Gold (Spizellomycetales)
        Sporangium, sporangiophore and part of the rhizoid system growing
        in culture (X 160)

18. Blastocladiella emersoni Cantino & Hyatt (Blastocladiales)
        Sporangium, sporangiophore and part of rhizoid system (X 64)

19. Allomyces arbuscula Butler (Blastocladiales)
        Gametothallus with antheridia (outer) and oogonia (inner) (X 160)

20. Allomyces arbuscula Butler (Blastocladiales)
        Sporothallus with resting spores (X 64)

21. Monoblepharella sp. (Monoblepharidales)
        Thallus with antheridia and oogonia (the globose bodies are
        probably mature oospores)

22. Polymyxa graminis Ledingham (Plasmodiophorales)
        Clusters of resting spores inside root cells of wheat (X 205)

23. Ligniera pilorum Fron & Gaillat (Plasmodiophorales)
        Resting spores inside a root hair of Impatiens

24. Hyphochytrium catenoides Karling (Hyphochytriales)
        Sporangia inside pine pollen (X 256)

25. Hyphochytrium catenoides Karling (Hyphochytriales)
        Growth from an infected pine pollen in two days on nutrient agar (X 50)

26. Lagena radicicola Vanterpool & Ledingham (Oomycetes)
        Sporangial thalli inside root cells of wheat (X 160)

27. Sparomyces elongatus (Cornu) Coker (Oomycetes)
        Sporangia (X 160)

28. Saprolegnia hypogynus (Pringsheim) de Bary (Oomycetes)
        Oogonia each with several oospores (X 64)

29. Pythium aphanidermatum (Edson) Fitzp. (Oomycetes)
        Clusters of sporangia growing on nutrient agar (X 64)

30. Pythium aphanidermatum (Edson) Fitzp. (Oomycetes)
        Oogonia, oospores and antheridia (X 256)

31. Pythium erythroseptica Pethybr. (Oomycetes)
        Oogonia, oospores and antheridia (X 256)