68 



BOTANICAL GAZETTE 



[JULY 



• 



Fig. 27. — Section of sporange dividing into zoospores; note characteris- 

 tic arrangement of chromatin in knot at one end or side of nucleus; X1800. 



PL A TE IX 



Fig. 28. — Free zoospores of two sizes; 



800 



zoospore 



Fig. 29. 

 Fig. 30. 



Figs. 31, 32. — Two large zoospores; > 



Fig. 23- — Large and small zoospore sh 



latter; position may be accidental; X1800 



formed 



X 1 800. 



800 









Figs. 34, 36. 

 Fig. 35. 



zoospores 



800 



zygospore 



800 



Fig. 37. — Amoeboidal stage following fusion, or perhaps developing with- 

 out fusion; nuclei have multiplied; X1800. 



Fig. 38. — Apparent budding in amoeboid stage; X1800. 



Figs. 39, 41. — Plasmodium and young infecting amoebulae in same host 

 cells; X1800. 





Fig. 40. 



zoospore 



X1800. 



PLATE X 



Fig. 42. — Plasmodium spreading through tissue of host; host nucleus 



visible ; 



800 



Fig. 43. — Plasmodium breaking through wall of host cell; X1800. 



Fig. 44. — Amoebulae within tissues of host; note nuclei in division; 



X1800. 



* 



Fig. 45. — Note as for fig. 42; no host nucleus visible. 

 Fig. 46. — Nuclei of Plasmodium in division; X1800. 

 Fig. 47. — Amoebulae massed in marginal cells of gall; 



800 





Fig. 48. 

 Fig. 49. 



figu 



X1800. 



sporange 

 X1800. 



Figs. 50, 53. — Anaphases in Plasmodium; X 



Fig. 51. — Budding or fragmentation of Plasmodium; X1800. 



Fig. 52. — Nuclei of sporange just preceding formation of spores; X 1800. 





Figs. 54-57- 



figu 







