Variation
var. discolor
This plant is endemic to the Balkans and produces smaller leaves that have white to grey tomentose on the underside.

Cultivars
'Mohican'
This plant forms a dense habit with dark green leaves and produces orange-red fruit.

'Rugosum'
This plant has large wrinkled leaves and produces larger flowers.

'Variegatum'
This plant has young growth that is slightly yellowish.

'Versicolor'
This plant produces pale new growth that turns yellow-gold during autumn.