A few more pics of the rose:

Rhode Island Red?

It does rather look like Rhode Island Red, but I have to doubt that in that it did not appear to be trying to climb (is there a shrub form??), and I did not notice the wonderful fragrance that RIR has. Also, it seems to me that RIR has a pointier bud than this (photo here of "Fields of the Wood" in our garden, thought to be 'Rhode Island Red').

Do you know if it reblooms, or were you just touring the grounds that once?

Just looking at the plant habit, I'd guess HP or early HT, but most of the famous reds were described as very fragrant. What was your impression of ancestry?

It's a beautiful rose.

Virginia

This was my only visit, ever, just last week. So no idea if it will repeat. I would have said HT or F.

There are some van Fleet roses that are all but lost nowadays. There's a black and white photo IIRC in an American Rose from the very early years that has that bud. He was choosing hybrids to be statement plants for front yards. And he crossed all sorts of things during and after his time in Tennessee at Ruskin.

It doesn't have the leaves to be Ruskin Rose.

Older style HT, the the mold of 'Radiance'. Could it be 'Red Radiance' I wonder?

I think Jeri grows Red Radiance, and and at one time I think Kim did, as well. Maybe they can confirm if this is RR.

DNA test?

@summersrhythm: that would only tell us its of Hybrid Tea pedigree, which we can see. It wouldn't tell us anything about the specific variety.

Thanks Paul. Can't wait to find out......

It does have a Red Radiance look about it, doesn't it? I wonder. That would be an easy one to do a DNA test on, since we have it and known sports of it in existence. We grow Mrs. Charles Bell at FSC. But since I only get to DC once every 40 years or so, I'll not likely get back to it! And perhaps not exciting enough to worry about; it concerns me more that the national botanic garden would keep it as Grootendorst Supreme.