Lynn - a OGR - old garden rose - is a rose that was developed usually in France or in Europe. They're not like a typical "rose" shape. A lot will get über big, rambling, sprawling, and a lot are single blooming. However, I think all are either fragrant or highly fragrant. Drawbacks are that they're usually not as resistant to black spot, mildew, rust, or other diseases I think. I'm not an expert on OGR's, so I am not 100% sure. Also, you won't find many "modern" colors (mauve, orange, bright yellow). That's the primary reason why I don't have many OGR's.. I like the gaudy colors. Also, many are single or doubles, but you won't find many in the "classical" or "florist" shape. However, there are many in the "cabbage" shapes (very full).
All in all, OGRs are excellent roses!!