1917] 



COLE— POLLEN OF ROSA 



123 



PLATE V 



Figs. 7-18. — Transverse sections of anther. 



Fig. 7 

 Fig. 8 



Fig. 



9 



Fig. 10 

 Fig. 11 

 Fig. 12 



Rosa oxyodon; X125. 



-Rosa spinosissima altaica; X 1 2 5 . 



Rosa spinosissima hispida; X 1 2 5 . 



Rosa spinosissima (gard. var. hyb.); X125 



Rosa spinosissima fulgens; X 1 2 5 . 



Rosa spinosissima; X125. 



1 



Fig. 16. 

 Fig. 17. 



PLATE VI 



Fig. 13. — Rosa rugosa; X125. 

 Fig. 14. — Rosa rugosa plena; X125. 

 Fig. 15. — Rosa rugosa alba; X125. . 



Rosa kamchatica; X250. 

 Rosa Manetti; X125. 

 Fig. 18. — Rosa Harrisoni; X125. 



