Has the ploidy ever been truly tested?

Also well-known among poetry lovers familiar with D.H. Lawrence's poem "Gloire de Dijon".

Gloire de Dijon
~ by D. H. Lawrence (1885–1930)

When she rises in the morning
I linger to watch her;
She spreads the bath-cloth underneath the window
And the sunbeams catch her
Glistening white on the shoulders,
While down her sides the mellow
Golden shadow glows as
She stoops to the sponge, and her swung breasts
Sway like full-blown yellow
Gloire de Dijon roses.

She drips herself with water, and her shoulders
Glisten as silver, they crumple up
Like wet and falling roses, and I listen
For the sluicing of their rain-dishevelled petals.
In the window full of sunlight
Concentrates her golden shadow
Fold on fold, until it glows as
Mellow as the glory roses.

The following reference is incorrect:
The Gardener's Monthly and Horticultural Advertiser
Magazine (Jun 1860) Page(s) 163.
Tea Rose - Glore de Dijon by Prof Page, Washington, D.C.
The following particulars are worthy of note at this time concerning this matchless Rose. I have twice *been* alluded ...

It should read "I have twice *before* alluded ..."

The Gardener’s Monthly 2(3): 69 (Mar. 1860)
HARDINESS OF CHINA ROSES
CHARLES G. PAGE, WASHINGTON, D. C.
There is probably no variety of rose that will endure a temperature of zero Fahr. upon unripened branches, and expanded leaf buds; and there are probably very few roses that will not endure this temperature provided the wood has been fully ripened and the buds are all dormant and the sap quiet. The Gloire de Dijon is an excellent illustration. It belongs to a tender family, but is perfectly hardy here. Its hardiness is not, however, entirely intrinsic, but depends upon its habit of growth. Unlike Teas and Noisettes generally, it stops growing in the fall, and is not apt to be quickened again till the spring. It prepares for winter like a Remontant, and has proved itself here more hardy than the majority of Remontants. In that rigorous winter of 1855-6, it stood better than La Reine, Madame Laffay, Wm. Griffith, and others. This winter has been thus far very destructive to Teas and Noisettes, but the Dijon is unharmed.