INFERTILE HYBRIDS. 203 
Fic. 44.—BRASSICA OLERACEA VAR. x B. SINAPISTRUM. 
bore a considerable resemblance to those of charlock, notably in the 
narrow, spreading sepals (fig. 46 c). 
Although hundreds of flowers were produced on the plants in the plots, 
and were attractive to bees, no fruit was set. ‘The pollen, examined 
microscopically, was found to be hopelessly poor. 
Fic. 45.—Leaves or (a) Curtep Kars, (b) Hyprip, (c) CHARLOocK. 
