246 



Explanation of Plates. 



PLATE III. 



(All Figures X 250.) 



PUCCINIA. 



Fig. 



20. Section of teleutosorus of Puccinia anthoxanthi on Anthoxanthum odoratutn, one- 



spore with a septate pedicel laterally inserted. 



21. Group of teleutospores of the same, one with a much inflated pedicel. 



22. Teleutospores of P. -poarum on Poa annua. 



23. Teleutospores of P. -per-plexans on Alo-pecurus geniculatus. 



24. Teleutospores of P. cynodontis on Cynodon dactylon. 



25. Section of teleutosorus of P. agro-pyri on Agro-pyron scabrnm. 



26. Group of teleutospores of P. impatientis on Elymus condensatus. 



27. Group of teleutospores of P. agrostidis on Deyeuxia forsteri. 



28. Section of teleutosorus of P. bromina on Bromus mollis. 



