Photoiiiicnigi'dplis of liotiin'ual Studies. 



55 



'». • 



88. — Stigma and Pollen of 

 " Triticum sativum," Wheat. 





« 





(^— Isloated pollen grains. 



.. ..... ,. >A .-■'' 



■• ^^->^-.^<i ♦-ij^ •■'.<■ W^V/, '.y ,',-' Pollen grain and so-called pollen 



• s) I'^^C^flfi i.^-:*4 ---t-, -^^i. tube. 



'"'^ S ■'■V *■*. m' 





» 





■ '"t!:^^''^"!™.^. ..•" t" ;;X.* - ^ Shaft of stigma. 



89. — Stigma and Pollen of 

 ^ " Triticum sativum," X 180 

 /^ (part of No. 88). 



Pollen grain with pollen tube. 



Nuclei of stigma. 



