She continues as sole editor of the work which is now in loose leaf form. This egg develops into the leaf form. He reprinted the literature present in the palm leaf form to paper books. The various rolling techniques used produce teas of different leaf form. There are two variations of this camouflage&colon; leaf form, and bark form. Changes in these morphogen gradients may also affect the leaf form. The veins on the leaf form a parallel pattern, containing primary and secondary veins. This leaf form is seen in around half of the species. The leaf form is present in a number of small-bodied species. With a short tip, leaf form gradually tapering away at the base of the leaf. His doctoral dissertation was entitled "Leaf form in relation to environment&colon; A theoretical study". Common names include "southern sassafras - narrow leaf form" and "blackheart sassafras".