Home » Plants » Persicaria longiseta

Low Smartweed (Persicaria longiseta (Bruijn) Kitag.)

Also known as creeping smartweed, Oriental smartweed, Oriental lady's thumb, bristly lady's thumb, Asiatic smartweed, long-bristled smartweed, Asiatic waterpepper, bristled knotweed, bunchy knotweed, tufted knotweed; also classified as Polygonum caespitosum var. longisetum, Polygonum cespitosum var. longisetum.

Page contents

Summary
Range
Description
Similar Plants
Links
Photos

Photo © , CC BY-SA 4.0.

↑Summary

An annual native to east Asia, widely introduced in North America where it is common in suburban gardens and disturbed urban habitats, and occasional in more intact wild ecosystems.

↑Range - Expand

Legend	Color
Introduced
Introduced or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

Although this plant occurs somewhere in each of these regions, it may only occur in a small part of some or all of them.

↑Description & Identification

Looks similar to other Persicaria species; the most distinctive features are the decumbent (sprawling and only weakly upright) growth habit and the long bristles on the sheaths beneath the inflorescence and also where leaves meet the stems.