Pedigree Chart of
Sea Urchin
, 2 W-Y, Guy L. Wilson, Northern Ireland, 1935
Albicans
Minnie Hume
N. radiiflorus
Laughing Water
Stella Superba
White Nile
Empress
Madame de Graaff
N. albescens
Mrs. Robert Sydenham
seedling
Sea Urchin
Tenedos