I suspect that there was a slight error.
The hybridizer has registered 25 daylilies. Of those one was registered as diploid -
Juste Pour Nathalie (Forget, 2009) height 24in (61cm), bloom 6in (15.0cm), season M, Rebloom, Dormant, Diploid, 10 buds, 4 branches, Rose cranberry self. (sdlg × Awesome Blossom)
The other 24 were registered as tetraploids.
En Liberté (Forget, 2010) height 26in (66cm), bloom 13in (33cm), season M, Rebloom, Dormant, Tetraploid, 9 buds, 4 branches, Spider Ratio 4.20:1, Petals red orange, orange sepals with yellow spikes. (Square Dancer's Curtsy × Heavenly Angel Ice)
It is probable that the registered diploid is a tetraploid and the registered tetraploid (above) is a diploid. I checked a few but not all of the other tetraploids registered by the hybridizer.
