I think this one takes the cake so far:
S. x 'Abnorma' (S. [ (flava v. rugelli x leuc) x (x Royal Ruby)] x [(x wilissi) x flava v. cuprea])
That comes out to, if you do the math -- [ (flava v. rugelli x leuc) x (flava x leuc)] x [(x (psittacina x purpurea) x (purpurea x (flava x purpurea))) x flava v. cuprea]
Mommy: (Flava v. rugelli x leuc) crossed with (flava x leuc aka "Royal Ruby")
Daddy: ((Psittacina x purpurea) x (Purpurea x (flava x purpurea))) (aka "Willisii") crossed with fava v. cuprea
Anyone seen anything more complex than that? I'm thinking of, once it matures, crossing it with a S. x godzuki (minor x oreophila) or something fun like that.