Everblooming Roses for the Out-door Garden of the Amateur p. 57 (1912) Georgia Torrey Drennan The years that have passed since these "Fairy" roses came to us from across the seas have wrought many changes. Hybridised with the Teas, the roses are of larger sizes, more luxuriant growth and more brilliant colours. Not that we love the Polyantha simplex less, but the Polyantha Teas more. These were obtained by crossing the Tea rose Madam Damaizin with Migonette, the most profuse of the dwarf roses. The result was Clotilde Soupert, known over the world as the hardiest everblooming rose of Tea kindred, except Gloire de Dijon. The rosy ivory-white, pinkish salmon tints of these roses, of such different classes, are much the same, rivalling the most exquisite picture Nature ever painted by a ray of light in a drop of water—the rainbow in the heavens. Clotilde Soupert is distinctly many petaled, true to its Polyantha parentage. The petals are lovely little shells, closely compacted together, forming an indescribably beautiful rose.
Andrew: with Clotilde Soupert, it has hairy & thin roots which are more suitable for LIGHT & LOAMY soil. My friend rooted that easily in ALKALINE sand, and gave to me. I lower my soil pH, by mixing in pine bark (pH 4), plus tons of acidic rain (pH 4.6 in Chicagoland). But OWN-ROOT Clotilde Soupert doesn't like sticky & heavy clay, regardless of the pH level. When I grew that in a pot, I added sand to make it DRIER & FLUFFIER, and it did well & zero balling in that loamy & fast-draining medium.
In contrast, THICK & CHUNKY own-roots like French Meilland & Romantica do better in my heavy & sticky clay, than in fluffy-potting soil. From my experience of growing over 100+ varieties of own-root roses: light & fluffy & hairy roots prefer lighter & fluffy soil, and heavy & thick & chunky roots prefer denser & heavy clay.
Whatever the "Registration name" means, the breeder called it 'Clothilde Soupert' - at that time all Clothildes in Luxembourg or France had a h! For me, a misspelling is not a synonym! But some people like to create new rose names.....
HMF has many instances of roses names that are not "correct" but over time have, often unfortunately, become common usage. HMF includes these various names to act as a cross reference and hopefully avoid the misconception of them being different roses.