Verbena officinalis, the common vervain or common verbena, is a perennial herb native to Europe. It grows up to a metre/yard high, with an upright habitus. The lobed leaves are toothed, the delicate spikes hold mauve flowers.
This is a beautiful vine with bluish green attractive arrow-shaped, glaucous leaves, and bearing superbly beautiful, large, bell-shaped flowers, approximately 7cm/3 in long and 5cm/2 in wide.