Hybrid Foetida, Species Rose 'Persiana'

I'm a bit confused. I have four different once-blooming roses which I believe are Rosa Foetida. One is the original single yellow, one ...Read Moreis the bi-color, one is a bright, deep yellow and doesn't smell very good and the other a bit paler and does smell good. The last two I've always thought were Rosa Foetida Persiana and Harrison's Yellow respectively. All of them, if you rub the leaves, give off a pleasant citrus smell. Any thoughts?

After blooming two canes with a different leaf pattern shot up and produced multiple red roses very similar to the description and pictur...Read Moree of Doctor Huey. Is Persian yellow a grafted rose? I thought it is a shrub with its own roots.

This is truely one of the great heirloom roses with the most fantastic and intense fragrance. Unlike newer roses this rose blooms only on...Read Morece a year but is smothered in double and semi-double blossoms for several weeks in late spring/early summer. The intense spicy fragrance lingers well after the petals have fallen. You can smell a large persian rose bush in full bloom from several houses away.

The Persian Rose is very winter hardy and does not die back even in zone 4 (and possible colder). It can become quite large. I've seen bushes 6' tall by 8' wide. Persian roses are very thorny and can be difficult to prune. They are long-lived (50+ years).