Purchased two Springs ago, preparing now for wintering it in, I removed the nursery tag from this terrific rhododendron, discovering that it is named Rhododendron catawbiense grandiflorum -- 'Nova Zembla' when he's at home. A good note at: http://www.paghat.com/rhody_novazembla.html; but no Nabokov connection.
Sandy Drescher