White Tausendschön cannot be found in the Search function as the "d" of Tausendschön is missing in the title.

I believe it should be characterised as a Hybrid Multiflora, as it is a sport of Tausendschön.

Reference:

George C. Thomas, "Roses for All American Climates", New York 1924, p. 182

"WHITE TAUSENDSCHON. (H.Mult.) W.Paul, 1913. Sport of Tausendschön.

Has the same characteristics as its parent.

E.K. Butler, of Jamaica Plain, Mass., in 1918 Annual, states that this rose has occasinally a few light pink markings."