Persicaria microcephala (syn.

Polygonum microcephalum), the small-headed knotweed, is a species of flowering plant in the family Polygonaceae.

[2] It is native to the Himalayas, and central and southern China, and it has been introduced to Great Britain.

[1] Its cultivar 'Red Dragon' has gained the Royal Horticultural Society's Award of Garden Merit.

This Polygonaceae article is a stub.