286 



Explanation of Plates. 



PLATE XXIII. 



(All Figures X 250 unless otherwise stated.} 



UROMYCLADIUM. 

 Fig. 



196. Uredospores of U. notabile on Acacia notabilis. Original type material of 



Uredo notabilis Ludw. (Somewhat swollen by lengthened treatment with 

 caustic potash.) 



197. Uredospores of the same, showing the net-like surface markings. ... x 500 



198. Compound stem, with basidia and uredospores of the same. 



199. Compound structure from uredosorus of same, being probably commencement 



of teleutospore formation ... ... ... ... ... x 500 



200. Uredospores of U. notabile on Acacia dealbata. 



201. 202. Uredospores of the same, showing the net-like surface markings... X 500 



203. Portion of spermogonium of the same, with basidia bearing spermatia in 



chains. (Stained) ... ... ... ... ... x 500 



204. Cluster of three immature spores of the same, attached to their stalk. (Stained.) 



205. Mass of mature teleutospores of the same, separated from each other, from 



Acacia decurrens. 



206. Mass of scarcely mature teleutospore?, separated from each other, of U. te$- 



perianum^ on Acacia melanoxylon, from Cheltenham, showing striated mark- 

 ings on the surface. These are considerably smaller than the average. 



