(1959)  Page(s) 14, 17.  
 
The objective of the breeding program on rambler roses has been the development of canes which would withstand temperatures as low as -20° or -25℉ without injury. Among the seedlings raised, selection has been made also for disease resistant leaves, vigorous growth, easy of propagation and a tendency to repeat blooming all summer long. To accomplish this purpose, a collection of species and hybrid roses from various parts of the world was made at the Horticultural Farm of the N.H. Agr. Exp. Station starting in 1950...
Durham Pillar Distributed for testing as N.H.#536, this is an open pollinated seedling of Chevy Chase rambler. The unique feature of Durham Pillar is its apparent freedom from both blackspot and mildew diseases. The leases are a glossy, olive green and are thick and relatively rigid. In the greenhouse the plant is an evergreen and continues growth all winter at 70℉ but will not flower under glass. In the garden it blooms continuously from June to frost in large clusters terminal to the pillar-length canes. The flowers have five petals and are red. The canes winter-kill to the soil line at temperatures below 17℉ but growth and flowering are satisfactory from the short basal canes as from a floribunda rose when it has been protected by mounding with soil. The variety seems to have some drought resistance and seems to grow more vigorously in warm seasons. Durham Pillar has 14 somatic chromosomes. It is a second generation seedling of Rosa soulieana Crepin by a dwarf China Rose hybrid which had the appearance of a Polyantha variety.

(1959)  Page(s) 14, 16, 20.  Includes photo(s).
 
The objective of the breeding program on rambler roses has been the development of canes which would withstand temperatures as low as -20° or -25℉ without injury. Among the seedlings raised, selection has been made also for disease resistant leaves, vigorous growth, easy of propagation and a tendency to repeat blooming all summer long. To accomplish this purpose, a collection of species and hybrid roses from various parts of the world was made at the Horticultural Farm of the N.H. Agr. Exp. Station starting in 1950...
Grafton Pillar Bright red, double flowers in large cluster produced continuously from June until severe frost characterize this rose. Distributed for testing as N.H.#551, it is a second generation seedling of Skinners Rambler x Gruss an Aachen (see chart). The flowers have 30 petals and are in terminal clusters on chanes two to eight feet long which places it inthe classification of a pillar rose needing the support of a fence or post but not growing as long canes as a rambler rose does. The canes are hardy to -20℉ but the leaves have a mild susceptability to both mildew and blackspot diseases. Spraying with a good fungicide is recommended...Leafy stem cuttings taken in July root and grow very easily. Gruss an Aachen...is a triploid rose having 21 chromosomes as verified in this project, yet it produced the viable pollen used on the 14 chromosome Skinners Rambler to produce a 14 chromosome seedling designated as SR3GAA. From this, 78 plants were grown in the F2 generation...

Grafton Pillar Rose pedigree at p. 20 shows the parentage of this rose as:
Seed parent: SR3GAA (seedling) (N.H. Agr.Exp. Sta. 1953) pink rambler, 2n
Pollen parent: SR3GAA (seedling) (N.H. Agr.Exp. Sta. 1953) pink rambler, 2n

(1959)  Page(s) 16-19.  Includes photo(s).
 
Skinners Rambler, the parent variety, was generously donated for this work by Dr. Frank L. Skinner, plant breeder and nurseryman, of Dropmore, Manitoba, Canada. It is a vigorous seedling of Rosa maximowizciana Regel having five pink petals, flowers in clusters in June on the preceeding years' canes, and sets viable seed with a number of unrelated pollen parents. It has 14 chromosomes and is therefore a diploid rose.
[Ed. note: The Bulletin goes on to describe breeding experiments using Skinners Rambler, including: self-pollinated seedling of Skinners Rambler; Skinners Rambler x Yellow Pinocchio; open pollinated seedling of White Mountains; Skinner's Rambler x Betty Bland; Skinner's Rambler x Rosa viginiana Mill; Skinners Rambler x Rose pomifera Hermm.; R. elanteria x seedling (Skinners Rambler self-pollinated); Skinners Rambler x Lady Penzance; Skinners Rambler x Oratam; Skinners Rambler x Bonfire; Skinner's Rambler x R. rubrifolia Vill.; and Skinner's Rambler x Max Graf.

(1959)  Page(s) 14.  
 
The objective of the breeding program on rambler roses has been the development of canes which would withstand temperatures as low as -20° or -25℉ without injury. Among the seedlings raised, selection has been made also for disease resistant leaves, vigorous growth, easy of propagation and a tendency to repeat blooming all summer long. To accomplish this purpose, a collection of species and hybrid roses from various parts of the world was made at the Horticultural Farm of the N.H. Agr. Exp. Station starting in 1950...
White Mountains Distributed for testing as N.H. #5217, this vigorous rambler resulted from the self-pollination of Skinners Rambler in 1952. Its small white flowers are borne in large clusters along the previous years' canes in late June. The individual flowers have 45 petals and resemble the "sweetheart" type rose in the bud. These flowers have remained on the plant in good condition for as long as 37 days, turning greenish white with age. The canes are slender, thorny and vigorous but not rampant. Additional plants are easily propagated from Summer cuttings and all plants have been comkpletely winter hardy at Durham, N. H. The leaves are of the R. multiflora type, bright green and disease free for the most part. "White Mountains" has crossed readily with other roses. This rambler produces large numbers of small fruits, green in color, that mature viable seeds early in the fall.
Skinners Rambler, the parent variety, was generously donated for this work by Dr. Frank L. Skinner, plant breeder and nurseryman, of Dropmore, Manitoba, Canada. It is a vigorous seedling of Rosa maximowizciana Regel having five pink petals, flowers in clusters in June on the preceeding years' canes, and sets viable seed with a number of unrelated pollen parents. It has 14 chromosomes and is therefore a diploid rose.