HuMan, you need to give us some more information if possible. Do you have any idea when these were planted, how old they might be? Also more photos of the buds, leaves, entire plant and some idea on the sizes of the plants and blooms would help.

Also, you say there are quite a few roses there. Usually if someone is into rose gardening they keep track of what roses they have. At the base of the plant there may be small name tags wired to the canes. Dig around the bases and see if you can find any tags.