Leaves – deciduous, simple, 3-5 shallow lobes, sinuses and margins are serrated, petioles are enlarged at base to enclose bud, stipules are leaflike. Twigs – leaf scar surrounds bud, stipule scar ...
http://www.plantphysiol.org/lookup/doi/10.1104/pp.92.4.1184,https://www.plantphysiol.org/content/plantphysiol/92/4/1184.full.pdf ...