326 Explanation of Plates. 



PLATE XLIII. 



(All Figures X 250.} 



PUCCINIA. 



Fig. 



308. Teleutospores of P. vittadiniae, mostly of a short broad type, on Vittadinia 



australis. 



309. Teleutospores and mesospores of the same. 



310. Teleutospores and mesospores of P. calotidis on Calotis sp. 



311. Uredospore of P. graminis on Avena Jatua, germinating in water, showing 



branching growth at the end of twenCy-four hours. jStained with Congo 

 red.) 



312. Mesospore of P. calendulas on Calendula officinalis, germinating in water after 



three days, two sporidiola produced, both of which have already germinated. 

 (Stained with Bismarck brown.) 



UROMYCLADIUM. 



313. Teleutospore of U. maritimum on Acacia longifolia, germinating after twenty- 



four hours in water, and producing four sporidiola from the lengthy pro- 

 mycelium. (Stained with Congo red.) (In some cases the promycelium 

 may be quite three times the length of that shown when germination takes 

 place in water.) 



314. Sporidiola of the same germinating in water three hours after formation. 



(Stained with Congo red.) 



315. Uredospores of the same germinating after three days in water. The germ 



tubes are very broad, with almost colourless contents, and extremely thin 

 wall. At first they are generally much contorted, and sometimes bifurcate 

 at the apex. (Stained with Congo red.) 



UROMYCES. 



316. Aecidiospore of U. betae on Beta vulgaris, germinating in water after twenty- 



four hours, the contents being collected towards the end of the tube where 

 branching is commencing. (Stained with Congo red.) 



317. Teleutospores of U. -politus, one being two-celled, on Muehlenbeckia cun- 



ninghami. 



318. Uredospores with two bands of germ pores, and teleutospores of U. bicinctus 



on Acacia -fasciculi-fera. 



319. Uredospores and teleutospores of U, polycnemi on Polycnemum -pentandrum. 



