The leaf blades are usually palmately divided into five to 28 leaflets , or reduced to a single leaflet in a few species of the southeastern United States .
They have a characteristic and easily recognized leaf shape , with soft green to grey-green or silvery leaves with the blades usually palmately divided into 5-17 leaflets or reduced to a single leaflet in a few species of the southeastern United States ; in many species , the leaves are hairy with silvery hairs , often densely so .