Other half-hardy species might include V. salicifolia (Willow-leaved Veronica), with long, narrow leaves, and white or purplish flowers; V. ligustrifolia (Privet-leaved Veronica), with spikes of feathery-white flowers; V. speciosa, with erect spikes of purplish-blue flowers; and V. Andersoni, a hybrid form, with spikes of bluish-violet flowers.