It's a rugosa. I wonder if it could be Bayesy's Purple, but there are several purple rugosas.

The leaves don't look particularly rugosa-ish to me? Certainly not Basye's Purple in any case, but I don't know it.

I wonder about Basye's Blueberry.

It looks like it could be a hybrid r. glauca. It doesn't appear to be 'Carmenetta' though.

I don't think it's either of Basye's...mine is much more double and it doesn't cluster like that....my Bayse's Purple clusters like that but the foliage is different and the flower a true purple....Is there a reason you ask for the specific name?

Susan

I am curious about the name because I might want to get one.

The long reddish sepals are what strike me the most. Is it perhaps a variation on any of the native roses around? The foliage looks wild to me.

Yes, I agree that the sepals are a key feature!

Rosa carolina has the long sepals as seen on the hips in these photos: https://gobotany.newenglandwild.org/species/rosa/carolina/ It could be a hybrid with something else.

You can't go wrong with either Basye rose but neither have those pretty sepals. Basye's Purple has a fantastic fragrance!

Susan

Could be a dark pink selection of a species rose from somewhere. Except for certain exceptional ones with yellow flowers, the mostly white musk rose species and so on most wild roses have the same general appearance.

A common one, weedy in North America and used for root-stock is the dog rose (R. canina) - perhaps that is what the plant asked about is, and it got into the collection as a stock. Normally R. canina is not so pink but otherwise I noticed somewhat of a resemblance right away.

It seems plants used as R. canina stocks may sometimes be hybrids of it also. There are thousands of kinds of roses grown, some quite specific information should be present before names for found roses are jumped on. If it is possible to find out what might have been at Vintage Gardens that this could be that would be a good direction to go in.

Thanks everyone for your input.

I didn't say this up front but yes, I am assuming it is a species rose or something close to one. Canina is one I had not considered yet. The leaves are kind of close but the prickles are completely different---hooked and far less numerous on canina.

It seemed like a fairly recent planting rather than an old rootstock but who knows? I was hoping that someone from Vintage might see this because I think most of the recent, non-hybrid tea plantings were donated by them.

Anne, I see the long sepals on carolina. I grow carolina and it just didn't feel the same overall---more matte foliage on the mystery rose.

R. canina is variable. But yes, if this one is prickly rather than thorny it would be expected to be something else.

That is certainly similar.

Yes, the mystery rose leaves are glaucous like R. glauca. But the leaves are not wrinkled and bright green like the hybrid rugosa/glauca. I don't see the traces of red in the sepals and the few prickles that I can see look different.

The hybrid is at Sangerhausen and is not listed as growing anywhere else which makes me wonder how it would end up in Oakland, CA.

Yes, I agree that it most likely isn't that rose, but I do think the glauca leaves are very distinctive. If you are looking for a similar rose, Carmenetta is an excellent landscape shrub. Beautiful foliage, nice erect vase shape to 6', and bright flowers.

It looks like it could be R. nutkana.

Does anyone who grows any of the variants of R. arkansana have an opinion about similarities?

Just a thought..

Virginia

Arkansana and nutkana are good candidates. The leaves seem close and I see the sepals in some nutkana pics and the prickles in some arkansana pics and on my own R. arkansana 'Woodrow'.

I can imagine how a curator might want to plant nutkana as an example of a native.

If that rose was photographed recently, that can't really be nutkana. That's a spring-bloomer. Also, it's a lighter color. Pink.

As for Arkansana -- Here's a look at leaf, bud, and blooms (Ignore the striping and streaking -- this is R. arkansana "Peppermint Candy."

But that, too, should be mostly spring-blooming.

The photo is from April.