Thank you for mentioning that Greg, about 'New Rhumba' being a sport of 'Red Lion'.
I went back threw my correspondence with Don (SMG) and found the information.
Don Mylin said:'New Rhumba' is a sport and not a hybrid. I found it amongst the cultivar 'Red Lion'. I find a lot of these, but they are rarely stable. Of the dozens that I have found and set aside only 3 have turned out to be relatively stable. All will revert to a degree which is true with any sport.
Mystery solved. Thank you Erwin for bringing this up.
So should we combine the two entries in the database, 'Red Lion Variegated' and 'New Rhumba', moving 'Red Lion Variegated' into the 'New Rhumba'?
I know the ones I got from SMG have remained variegated.