Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Persicaria lapathifolia (L.) S.F.Gray image
Photographer: Richard Bauer           

Botanical Illustration

Botanical Illustration

Botanical Illlustration

Emmet J. Judziewicz

Kitty Kohout
Family Polygonaceae
Persicaria lapathifolia (L.) S.F.Gray
curly-top knotweed, dock-leaved smartweed, heart's-ease
Persicaria: peach-like, the medieval name for knotweed
lapathifolia: Lapathum, a kind of Rumex
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, annual, 2'-5' tall forb; stems with nodes either smooth or cut, but not hairy; taprooted
Flower: white-green to pink, 4- or 5-parted, 1/8" long, petals and petal-like sepals connected at the base; inflorescence many 1/3"-2" long, nodding, spike-like clusters on a stalk jointed at the top; blooms July-Sept.,
Fruit:dry seed flat or concave on both sides
Leaf:alternate, variable but usually lance-like, often woolly beneath
Habitat: wet to moist; disturbed sites

More Information Natural Communities Herbarium Specimens
All Persicaria list Google- Images or Text

Flora of North America (off site)
Persicaria incarnata (Elliott) Small
Persicaria tomentosa (Schrank) E.P.Bicknell
Polygonum incarnatum Elliott
Polygonum incanum F.W.Schmidt
Polygonum lapathifolium L.
Polygonum lapathifolium L. subsp. pallidum (With.) Fr.
Polygonum lapathifolium L. var. incanum (F.W.Schmidt) W.D.J.Koch
Polygonum lapathifolium L. var. lapathifolium
Polygonum lapathifolium L. var. nodosum (Pers.) Small
Polygonum lapathifolium L. var. ovatum A.Braun
Polygonum lapathifolium L. var. prostratum Wimm.
Polygonum lapathifolium L. var. salicifolium Sibth.
Polygonum nodosum Pers.
Polygonum oneillii Brenckle
Polygonum pallidum With.
Polygonum pensylvanicum L. subsp. oneillii (Brenckle) Hultén
Polygonum scabrum Moench
Polygonum tomentosum Schrank

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