@bron
I have Floyd Cove daylily catalogues that date from the 1990s. This is what Pat Stamile indicated was the parentage of his 'Lavender Memories' in the catalogue that introduced the plant.
Tet. T-738-B (Houdini x Tetra Yesterday Memories) x (Prom Date x Tetra Lavender Dew)
The AHS parentage information in the registration database for 'Lavender Memories' is probably a typographical error introduced at some point in the process - it is incorrect.