I noted recently that various Persicaria species and cultivars are becoming increasingly popular in gardens and garden design. I planted the shrub-like P. amplexicualis 'Firetail' a number of years ago as seen above. Actually it has been reassigned botanically speaking and is now Bistorta amplexicaulis. 

 Tip: it dies down entirely over winter and the new stems don't start to appear until early summer so it's possible to have spring flowering bulbs in the same space.

 I can see why it's called 'Firetail' or perhaps it was 'Firedance'. Anyway, it's fiery.

 Not sure why but it seems to attract wasps in particular.