I have become interested in Sculpted Relief daylilies, if you set out 100 of them and asked me to guess the ploidy I would have a very good chance of being correct 100 percent of the time. Of course I looked in the database and only found 8 dips as being Sculpted Relief, of the ones with pictures really only one 'Traded To The Yankees' actually looked like a Relief bloom, and its pollen parent is unknown, so maybe just a mistake?
I looked up the definitions for the two in the AHS dictionary and saw the only real distinction they made was the number of chromosomes, so that to me indicates that it might be hard to look at the plants and tell just by looks.
Here is an interesting link just for fun.
http://icantbelieveitsadip.com...
Now I am not saying that a really experienced daylily person could not tell the difference at least in most daylilies by looking, but I would not be confident in my guesses. Others might.
Here is a thread from an older poster:
The thread "Tetraploid vs diploid daylilies" in
Daylilies forum
I hope others will post what they have observed.