Persicaria can be annuals, herbaceous or evergreen perennials or sub-shrubs with simple leaves and small bell-shaped white or pink flowers in long-lasting spikes or panicles
'Donald Lowndes' is a mat-forming, partially evergreen perennial to 20cm in height, with dark green, narrowly elliptic leaves and erect spikes of small pink flowers which darken with age, finally turning orange-brown