I recommend you find a copy of Georgia Torrey Drennan’s “Everblooming Roses For The Outdoor Garden Of The Amateur” (1912). In it, she devotes a chapter titled “Where They Sleep”, which is a loving devotion to the history and meaning of various cemetery-planted roses, including Rosa Alba (which she, being a Southerner, referred to as the “White Tea”) it has been reprinted and available online.
Even if it didn’t have this chapter, it’s a good book, and she was a very interesting person. Her husband William Drennan was a Confederate lieutenant, and the letters he sent her during the Civil War are also published, and are an insight into those dark days as perceived by the South.