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Polygonum lapathifolium (Curlytop knotweed) | NPIN

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Polygonum lapathifolium (Curlytop knotweed)
Loughmiller, Campbell and Lynn

Polygonum lapathifolium

Curlytop knotweed, Curl-top smartweed, Pale smartweed

Polygonaceae (Buckwheat Family)

USDA Symbol: POLA4

USDA Native Status:

Polygonum lapathifolium has arching, white or pale rose flower spikes and usually smooth stems.


Plant Characteristics

Duration: Annual
Habit: Herb
Size Class: 3-6 ft.

Bloom Information

Bloom Color: White , Pink , Purple
Bloom Time: Jul , Aug , Sep , Oct


USA: AK , AL , AR , AZ , CA , CO , CT , DC , DE , FL , GA , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NV , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WY
Canada: NB , NS , PE

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Native Seed Network - Corvallis, OR


Bibref 328 - Wildflowers of Texas (2003) Ajilvsgi, Geyata.

Search More Titles in Bibliography

Recommended Species Lists

Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.

View Recommended Species page

Additional resources

USDA: Find Polygonum lapathifolium in USDA Plants
FNA: Find Polygonum lapathifolium in the Flora of North America (if available)
Google: Search Google for Polygonum lapathifolium


Record Modified: 2012-08-21
Research By: TWC Staff

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