QuestionsHow to growTrees and ShrubsChoosing trees and shrubsSorbaria/Sorbifolia Sem?? 0 Vote Up Vote Down HUGH HENDERSON asked 10 years ago What shrub is named sorbaria or sorbifolia Sem as i have searched all my gardening books and cannot get it? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 3 years ago Sorbaria is a medium shrub with ash-like leaves and white plumes, quite like spirea, which it was once called. It is occasionally seen in old gardens, not often for sale. ‘Sem’ is a variety with orangey young foliage.