Small polypeptide acting as a regulatory molecule which coordinates cellular responses required for differentiation, growth and development, including leaves shape, pedicule elongation, inflorescence organization and fruit maturation, probably by restricting polar cell proliferation in lateral organs and coordinating socket cell recruitment and differentiation at trichome sites. Mostly expressed in roots and flowers, and, to a lower extent, in leaves and stems. Belongs to the DVL/RTFL small polypeptides family.