The famous old orange daylily and the well-known old yellow "lemon lily" are not the only "wild" daylilies, just the most famous. There are 20 daylily species, worldwide. Today from those 20 plants, more than 20,000 hybrids have been created, to satisfy gardeners who love daylilies, and just can't get enough. Hybridizing daylilies for various colors and styles is not new. Famous old reliable hybrids like soft pink 'Barbara Mitchell' and 'Catherine Woodbury' - the lovely lavender and yellow bicolor - have been around for decades. And of course, by now there are various flower forms. The American Hemerocallis Society lists these as official types: Circular, Triangular, Star, Informal, Ruffled, Flat, Recurved, Trumpet, Spider, and Double.