288 



Explanation of Plates. 



PLATE XXIV. 



(All Figures X -50 unless otherwise stated.} 



UPOMYCLADIUM. 



Fig. 



207. Teleutospores of U. bis-porum, on Acacia dealbata, one cluster of two showing 



the common staik. 



208. Teleutospores of the same. 



209. Uredospores of U. al-pinum, on Acacia deaHata. 



210. 211. Teleutospores of the same. 



212. Five uredospores of U. alpinum on Acacia dallachiana^ mixed with teleutospores 



and one mesospore (M). 



213, 214. Successive stages in the development of teleutospore clusters of the same. 



(Stained.) 



215. Group of teleutospores of the same. 



216. Section of leaf of Acacia longifolia attacked by U. maritimum, the uredosori 



being at the margin of the inflated tubercle, and the spermogonia in the 

 centre ... ... ... ... ... ... ... x 30 



217. Uredospore of U. maritimum attacked by some Hyphomycete, which has gained 



access to the interior of the spore and grown within it preparatory to forming 

 the long septate threads which have pierced the wall near the germ pores. 



