Pedigree Chart of Greenholm, 2 W-GWW, Brian S. Duncan, Northern Ireland, 1981

Silver Coin
N. poeticus var. hellenicus
Tryst
Hexagon
Armoy
Crimson Braid
Easter Moon
Quartz
2W-W seedling
Naxos
Greenland
Silver Plane
Chinese White
(Silver Coin x unknown)
Greenholm
Beersheba
Tain
[(Weardale Perfection x White Emperor) x Beersheba]
Cotterton
(Blizzard x unknown)
Evening
Knowehead
King Alfred
Trostan
Askelon
Broughshane
Brodie 1W-W seedling
Kanchenjunga
Askelon