I saw 50 daylilies registered by Primos on the AHS site, but the last one was in 1986, or somewhere close to that date. The earliest seems to be about 1966. So, that leads me to believe that they are probably no longer actively hybridizing. The majority appear to be named after family members.
Type Primos into the Hybridizer box on the right, and click search. This will take you to all of the ones that the person registered. I didn't see any familiar names, but with so many out there, that isn't surprising.
http://www.daylilies.org/Dayli...
Sorry, but that is all I could find!
