"Tetraploid"
Have you ever heard of a plant described as a tetrapoid? This means it is an organism with twice the number of normal genes. Tetraploid plants can be more vigorous, with larger blooms. They can be created by using colchicine, a derivative of the autumn crocus, to double the chromosomes, or can occur spontaneously. Commercial daylilies are often tetraploids (44 instead of 22 chromosomes).
Happy gardening!
