The leaf is long-petioled, about 7 to 10 cm in length. It has a heart-shaped or egg-shaped form and is shallowly three- to five-lobed. The margin is serrated or toothed, featuring palmate venation. Both the petiole and the leaf blade are gray-green on both sides and covered with a silky tomentose layer. Sometimes fragments of flowers or unripe fruits may be present on the leaf.
It is listed in the pharmacopoeia.
In pulverized drug under the microscope we can see:
Long, unicellular covering trichomes, often broken
