PhotoComments & Questions 
Rosa xanthina duplex  rose photo courtesy of AmiRoses
One or more site guests believe this photo is incorrectly labeled or inaccurate !
Discussion id : 66-520
most recent 25 AUG 12 HIDE POSTS
 
Initial post 23 AUG 12 by Charles Quest-Ritson
I think this should be separately listed as Rosa xanthina f. duplex but, before setting up a new listing, you ought to consider whether (and how) it differs from 'Allardii'. L'Ami Roses is an excellent photographer, but he does not question the names that he finds in gardens - and there are many mistakes of attribution or identity in some of his favourite haunts like la Roseraie du Val de Marne. Charles Quest-Ritson.
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Reply #1 of 5 posted 23 AUG 12 by RoseBlush
So how does it differ from 'Allardii' ?

Smiles,
Lyn
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Reply #2 of 5 posted 24 AUG 12 by HMF Admin
Please be aware when you refer to "you", you are speaking to the HMF rose community reading these posts.

We welcome input from others here - please help.
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Reply #3 of 5 posted 24 AUG 12 by AmiRoses
I don't understand the comment. This photo is labeled Rosa xanthina duplex so why should it be in a different list?
From early references, Rosa xanthina L. is double and synonyms are Rosa xanthina duplex or plena.
The single form has been discovered after and is called Rosa xanthina f. spontanea or f. normalis.
So yes, I check my sources when possible.

The main difference with allardii is that the inner petals are tight and crumpled.
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Reply #4 of 5 posted 25 AUG 12 by Charles Quest-Ritson
There are a number of points that need to be considered here. First, I have only just signed up for HMF and I did not realise that a note to the administrator would be posted on the site and that AmiRose would be asked to respond. My criticism was not intended for publication and I am sorry for the annoyance that it will have caused AmiRose. Second – and this was the point of my note – it cannot be good policy for HMF to combine photographs of two different roses in the same folder. If you wish to treat the double form as the type, then I suggest that you ought to create a separate folder for the wild single-flowered form as f. normalis.

So far as AmiRose's response is concerned, I think it might be worth pointing out that R. xanthina was not described by Linnaeus, but by Lindley.

But there is a bigger problem of identification that needs to be resolved – is AmiRose's photograph of R. xanthina f. duplex correctly named, and is it indeed distinct from 'Allardii'? It would be helpful if he could tell us where he took his photograph i.e. is it in a garden where we can study it or, if it is in his own garden, can he tell us where he bought it? The same is true of 'Allardii', which he clearly knows well enough to make the comparison; where has he seen it or from whom did he acquire it? If he has further pictures of either of them, it would be useful to see them, too. I am not sure that having 'tight and crumpled inner petals' is a sufficiently distinctive characteristic, unless it is a consistent one – petal-shape is often the result of physiological factors, rather than genetic ones.

I have only seen 'Allardii' once – at Cavriglia – where it was named 'xanthina plena'. Jaeger thought f. duplex was synonymous with 'Allardii' but then listed it as hybrid of R. spinosissima, adding that it was close to 'Harisonii'! But I think this may indicate that several different roses are circulating under the same name and this seems to me precisely the sort of problem that HMF is well placed to resolve.

One more point – AmiRoses is a wonderfully skilled photographer, but he does not always say where and when he took the photographs that he posts to the HMF website. Would it be possible [1] for him to go through his pictures and add this data – a boring job for a winter's day, perhaps? [2] for HMF to alter its procedure for uploading pictures so that this data is a compulsory requirement in future? It would add enormously to the value of its pictures.
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Reply #5 of 5 posted 25 AUG 12 by jedmar
The botanical name was incorrectly stated as Rosa xanthina L. This is now corrected to Rosa xanthina Lindl. The single form was already listed separately as R. xanthina f. normalis Rehder & E.H. Wilson. However, some photos of the single form seem to have been posted to R. xanthina Lindl. (the double form). Understandably, the reversion of the usual single / double nomenckllature in this case is confusing. We will move the single photos to where they belong.
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Discussion id : 25-886
most recent 30 APR 08 HIDE POSTS
 
Initial post 30 APR 08 by Robert Neil Rippetoe
This photo should be posted under R. xanthina duplex.
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Reply #1 of 4 posted 30 APR 08 by AmiRoses
It is !
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Reply #2 of 4 posted 30 APR 08 by Robert Neil Rippetoe
It's posted under R. xanthina.
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Reply #3 of 4 posted 30 APR 08 by AmiRoses
It's a synonym.
The single form is rosa xanthina f. normalis.
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Reply #4 of 4 posted 30 APR 08 by Robert Neil Rippetoe
I see it now. Sorry for the confusion.

I'm still trying to sort out the photos I have posted. As you can tell from the prickles they don't seem to fit under R. xanthina normalis either.

They most resemble only some of the photos of 'Canary Bird', and also don't fit some of the descriptions. The foliage is not fragrant or hairy and the stems are heavily prickles not just near the base. I'd love to get it sorted out.

I'm still undecided as to where to place them. Thanks, Robert
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