A very unusual umbellifer, the umbels of flowers being condensed into a head surrounded by coloured bracts - in this case the whole inflorescence and the leaves immediately below it being heavily tinted with a rich reddish brown, which contrasts gorgeously with the soft green oval leaves.
There seems to be a lot of confusion about the name of this plant. I've seen it offered as angulosum and perfoliatum, and called Copper form. The name used here seems like the best fit though.
As time goes on it just gets better and better.
An easy perennial for a rich moist soil in sun or part shade.
1L pots ~ £8