Explanation of Plates. 



PLATE XXIX. 



{All Figures x 500 unless otherwise stated.^ 



USTILAGO. 



Fig. 



28. Spores of U. hidlatu. 



29. Germinating spores of U. hullata. 



30. Germinating spores of U. hullata (after Brefeld) x 350. Tlie two spores producing 



two and three germinal tubes respectively, but no conidia were germinated in 

 water. The others were germinated in nutritive solution, and show not only 

 the formation of conidia, but one conidium sproutin in a veast-like manner,, 

 and another producing a filament at both ends. 



31. Spores of U. calandriniae. 



32. Spores of U. olivacea from original material from Ludwig. 



33. Spore-forming hyphae from same. 



34. Spores of U. olivacea from Tasmanian material. 



35. Spores of U. olivacea from Sydow's Ustilagineen, No. 357. 



36. Spores and spore-bearing mycelium of U. olivacea from preceding. 



