Growth rate variations for two paraboloidal domes: A and B. identical when seen from the outside but differing in the internal pattern of principal growth directions. were modeled by means of the growth tensor and a natural coordinate system. In dome A periclinal trajectories in the axial plane were given by confocal parabolas (as in a tunical dome). https://parisnaturalfoodes.shop/product-category/pantothenic-acid/