Hi Paul,
One of my current favorite registered yellow daylilies is Whatley's Crocodile Jaws (1998). In my central NC garden it grows about its registered 26" height. Big, beautiful, ruffled flower, well branched and budded scapes. I've grown many of Whatley's yellows and this is one of the best in my opinion...excellent plant habit and flower. And unlike some of his other beautiful yellow daylilies, this one has no difficulties opening.
