Thanks for the information and link Dave. Many of the A. andraeanum cvs. in our db are patented plants with A. andreanum (orthographic variant of A. andraeanum) noted as their parentage. Neil Carroll explains that use nicely in the link you provided. We can either delete the species epithet altogether, as Zuzu suggests, or replace it with x cultorum.
As for using A. x cultorum, I'm unsure. Carroll notes
..many in fact are hybrids of several closely related species in section Calomystrium...
GRIN notes A. x cultorum as a synonym of
A. x ferrierense, a simple hybrid cross of A. andraeanum x A. nymphaeifolium. I've located a copy of The Cultivated Aroids, Birdsey not too far from here so I'd like to compare that description to the one in the GRIN. If you know of an online copy please let me know.
Regardless, changes will be made and I appreciate your bringing this to our attention. I'll report back with what I find.
