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.
The most well known species of carnivorous plants. Traps have a limited number of false alarms. Don't stimulate them too often. Artificially springing the trap drains the plant's energy.