MADAM FERNAND KOHL
From Palmpedia - Palm Grower's Guide
Codiaeum variegatum Madam Fernand Kohl
This croton was hybridized by French horticulturist Monsieur Chantrier in 1907.
REF: Brown, B. Frank 1995 Crotons of the World p.110, Madam Fernand Kohl (yellow) p.116 & p.119.
The photo of the unnamed hybrid on p.110 is also believed to be Madam Fernand Kohl.