You can clean up your plants by removing any of the dead petals, but leave the hips in place to send this signal to the plant. Many of the wild roses with a very short bloom period more than make up for this with lovely hips. Hips can fall into one of approximately 10 shape categories. They also vary by colors and sizes along with textures and armaments such as bristles or prickles. Some may be black, while others are orange and shapes vary in size and can resemble polished hard shells.
Most hips are in the red category.
They can range in size from very small either singles or clusters to very large resembling crab apples or cherry tomatoes. In recurrent roses, hips are not particularly desirable as they drain the plant's energy and prevent subsequent flowering. This is why rosarians 'dead-head' these varieties to encourage subsequent flowering. This can be a desirable feature of a rose since the faded petals will drop cleanly from the plant. There are exceptions as with the Rugosas.