Snapdragon
Latin: Antirrhinum majus
Irish: Srubh lao
This is the same as one sees as an ornamental species in gardens. It is not a native species and is, most likely, a garden escape from many years ago.
It has two-lipped tubular flowers in a range of colours, white, yellow, pinkish, red. It reproduces via self pollination and it sets seeds freely. It is slightly frost-tender.
It is widely held that some established populations naturalised on old walls and that naturalised plants often have reddish flowers.
Specimens can be found growing on the walls in the Walled Garden and in the machinery yard.
Many of the specimens growing there have white flowers but there are some pinkish/red coloured types also.