Pedigree Chart of Tweeny, 12 W-Y, Alec Gray, England, 1950

Renown
Mortlake
Unknown
G.L. Wilson 2Y-Y seedling
Ben Alder
1Y-Y
Broadford
Elgin
(Weardale Perfection x unknown)
Yukon
Tweeny
bold;">#0066cc">N. rupicola subsp. watieri