Aliens: Introduced wildflowers in Ireland

I have used the term 'alien' to very loosely describe wildflowers not originally native to Ireland. Some of these have become well establised, others are more recent or only casual. Its interesting to realise that there are more introduced species found growing wild in Ireland than species known to have been here before the last Ice Age. (Ref. Census Catalogue of the Flora of Ireland 2nd. edition) More Garden Escapes found growing wild can be seen by following the link.