Athyrium flexile, commonly known as Newman's Lady-fern, is a fernendemic to Scotland.
It is an upland variety typically found above 750 metres on screes made up of siliceous rocks such as quartzite and granite in the Highlands where it is found at only four sites. It is a snow-tolerant species, the snow lie protecting it from frosts.
Athyrium flexile is a stunted variety of Alpine Lady-fern A. distentifolium, a single gene mutation accounting for the difference between the two. It is considered by some experts to be a variant of Alpine Lady-fern (Athyrium distentifolium var flexile) rather than a distinct species.