This is from Dickson's catalogue season 1914-15 where 'Lady Plymouth' is listed amongst the 1914 Novelties:

LADY PLYMOUTH (Tea) - A most distinct and meritorious rose, of the "Souvenir de Pierre Notting" type, whose pearly, delicate, but deep ivory, cream petals are very faintly flushed, giving it a most piquant finish that is difficult to describe. The blooms, which are carried on a rigid peduncle, are very large, full, and of spiral form. It has very vigorous, bronzed, erect, growth, and possesses in a marked degree a continuous growing and free flowering habit. It is delicately pure tea perfumed, and specially valuable for pot culture. To secure blooms of exhibition standard, treatment similar to that observed in the culture of "Maman Cochet" should be followed, when blooms of distinct superiority will result. Awarded Gold Medal, N.R.S., and Silver Medal, Best Tea Rose, Crystal Palace. London.