Red Dead-nettle

Lamium purpureum

May be found in cultivated and waste places, and common throughout Britain, especially as a garden weed.

It is entirely unrelated to the Stinging Nettles, and apart from the resemblance in the form of the leaves there is little likeness between them.

Flowering from April to October.

The Observer’s Book of Wild Flowers, compiled by W. J. Stokoe (1957)