This tiny creeper loves to grow into crevices in brick walls all over the UK and Europe
This tough little plant has evergreen leaves and small flowers roughly similar to snap dragon flowers.
The plant was apparently introduced when a shipment of sculptures arrived in the UK from Italy. It has spread quickly and is now thought to be an invasive species.
This plant has an unusual method of propagation. The flower stalk is initially positively phototropic and moves towards the light. After fertilisation, it becomes negatively phototropic and moves away from the light. This results in seed being pushed into dark crevices of rock walls, where it is more likely to germinate.