In the Belousov-Zhabotinsky reaction system bromide ions are generated periodically. When AgNO₃ solution was added to this system, AgBr grains were prepared and the periodical pBr oscillation was sustained during addition of the solution. In previous research we added drops of AgNO₃ solution synchronously to the pBr oscillation. This time we added AgNO₃ solution by continuous flow and observed the pAg (pBr) oscillation and grain shapes. The periodical pAg oscillation was also sustained. At some addition rates, dendrite grains with four, five, six, or eight long branches were formed. In some grains, secondary nucleation took place on the surface of branches and many warts aligned. We believe that the grain corners grew preferentially.