Calla Lilly Zantedeschia with flower pattern mirrored on the leaves
 

Is it normal for a Calla Lilly to bloom, and the leaf, instead of
being green, one leaf had a splash of yellow, complete with brown
stamen - on the leaf - ie the same flower pattern on the leaf.
If this is a rare occurrance, is it worth anything to plant breeders?

Thanks

Peter (Canberra, Australia)