Variation
var. orientalis
This plant is similar to the species but has broader leaves.

var. spinosa
This plant is similar to the species but has more spiny branches.

Cultivar
'Quicksilver'
This vigorous suckering shrub with silvery shoots and very silvery lanceolate leaves up to 50mm (2in) long. The flower buds are also silvery and the plant forms an open habit.