Again, if she left the flower in the car or at home, it wasn’t a big deal. If she left it at home, you’d have the added effect of her parents seeing the flower and thinking that maybe you weren’t the young jerk they imagined you to be. Lol. And if she left it in the car, well, as long as she brought it home with her at the end of the date, then it’d have the desired effect as well. So nothing lost.
Of course, if she decided to bring the flower along, then you’d have the added effect of other people seeing the two of you and thinking that maybe you weren’t a complete jerk of a date either. Assuming of course that you got her a flower that was at least decent to look at. Felt pretty good actually. The feeling that other people might see that you weren’t just another stupid male date.