Posted: 26/05/2015 at 16:23
Growing behind my pond in the shade - bone dry in summer, damp in winter. The plant is a good 15 - 18" tall with very fresh-green coloured scented leaves. The flower is small - little more than a centimeter in diameter, with pretty fringed petals. It dies right down in the winter.
This might be one given to me by lovely Nutcutlet, or it might be one of the interesting unknowns that spring up from time to time in this garden.
It's bottom right in the third pic - to show scale etc.