28 4 



Explanation of Plates. 



PLATE XXII. 



(All Figures X 250 unless otherwise stated.} 



UROMYCLADIUM. 

 Fig. 



185, 186. Uredospores of U. robinsoni on Acacia melanoxylon. The solitary large 

 smooth-walled spore (?) in Fig. 186 is difficult of interpretation. 



187. Young and mature teleutospores of same, with and without attached vesicles. 



(Stained.) 



1 88. Mature teleutospores of same, with vesicles. 



189. Mature teleutospore of same germinating, the sporidiola just about to be formed. 



(Stained.) 



190. 191, 192. Successive stages in the development of a. teleutospore head of U. 



te-p-perianum on Acacia salicina, the striated epispore being clearly shown in 

 192. (Stained.) ... ... ... ... ... ... X 500 



193. Single teleutospore of same, seen from above, and showing striated mark- 



ings ... ... ... ... ... X 500 



194. Mature teleutospore head of same. (The markings are indistinct on account 



of poor condition of material) ... ... ... ... X 500 



195. Detached teleutospores of same. 



