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Loughmiller, Campbell and Lynn
Polygonum lapathifolium L.
Curlytop knotweed, Curl-top smartweed, Pale smartweed
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
Polygonum lapathifolium has arching, white or pale rose flower spikes and usually smooth stems.
Plant CharacteristicsDuration: Annual Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: White , Pink , Purple
Bloom Time: Jul , Aug , Sep , Oct
, WY Canada: NB
National Wetland Indicator Status
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 either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2012-08-21
Research By: TWC Staff