Native Plants

Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

Enter a Plant Name:
Or you can choose a plant family:

Loughmiller, Campbell and Lynn

Polygonum lapathifolium

Polygonum lapathifolium L.

Curlytop Knotweed, Curl-top Smartweed, Pale Smartweed

Polygonaceae (Buckwheat Family)

Synonym(s): Persicaria incarnata, Persicaria lapathifolia, Persicaria tomentosa, Polygonum incanum, Polygonum incarnatum, Polygonum lapathifolium ssp. pallidum, Polygonum lapathifolium var. incanum, Polygonum lapathifolium var. nodosum, Polygonum lapathifolium var. ovatum, Polygonum lapathifolium var. prostratum, Polygonum lapathifolium var. salicifolium, Polygonum nodosum, Polygonum oneillii, Polygonum pensylvanicum ssp. oneillii, Polygonum scabrum, Polygonum tomentosum

USDA Symbol: pola4

USDA Native Status: L48 (N), AK (I), CAN (I), GL (I), SPM (I)

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

From the Image Gallery

27 photo(s) available in the Image Gallery

Plant Characteristics

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

Bloom Information

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

Distribution

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.

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	FACW	FAC	FACW		FACW	OBL		FACW	FACW	FACW

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

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

Bibliography

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

Search More Titles in Bibliography

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

Metadata

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

Go back