Image P. Stroh
Lemon-scented fern gets its name from the distinctive lemony smell which comes from yellow glands on the underside of the leaves. If you encounter this fern in the wild, do bruise and sniff a fresh leaf to release the scent!
This BSBI distribution map shows you where to look for lemon-scented fern. As you'll see, it is very happy in Scotland but absent from many parts of the English east midlands!