Yes, but the flower isn't the only part of a plant that needs to be taken into consideration. Roses have relatively small leaves compared to the flower, but on this particular plant, the leaves well exceed the size of the flower. And they are also different shape to those of a rose.

Oh, and according to Wikipedia [rose hip](https://en.wikipedia.org/wiki/Rose_hip) is indeed the fruit of the rose plant:

> The rose hip, also called rose haw and rose hep, is the accessory fruit of the rose plant.