Nature's Smile (牝 1920 鹿毛 Rabelais)
 |-- Serenity (牝 1926 鹿毛 Man o'War)
 |   |-- Sickle Pear (牝 1931 栗毛 Sickle)
 |   |-- Black Lashes (牝 1934 鹿毛 Sickle)
 |   |   `-- Bea Right (牝 1946 鹿毛 Bimelech)
 |   |-- Secret Rose (牝 1936 黒鹿毛 Blue Larkspur)
 |   `-- Annunciata (牝 1937 黒鹿毛 Sickle)
 |-- Native Wit (牝 1929 鹿毛 Fair Play)
 |   `-- Native Gal (牝 1939 鹿毛 Sir Gallahad)
 |       |-- Billings (牡 1945 栗毛 Mahmoud)
 |       |-- Witty (牝 1946 栗毛 Rhodes Scholar)
 |       |-- Native Valor (牝 1948 黒鹿毛 Mahmoud)
 |       `-- Royal Native (牝 1956 栗毛 Royal Charger)
 `-- Pellet (牝 1932 黒鹿毛 Man o'War)
     `-- Layout (牝 1941 黒鹿毛 Sickle)