Pedigree Chart of
Warkworth
, 3 W-YYO, Gordon Harrison, England, 1971
Actaea
Otterburn
seedling
Warkworth
Chaucer
Warlock
2W-W seedling
Monaco
Penquite
Signal Light
Firebrand
Hospodar
King Alfred
Flamenco
Will Scarlett
Sunstar
Unknown