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 hydropiperoides (Michx.) Small image
Photographer: Emmet J. Judziewicz           

Emmet J. Judziewicz

Emmet J. Judziewicz
Family Polygonaceae
Persicaria hydropiperoides (Michx.) Small
false water-pepper, mild water-pepper, swamp smartweed
Persicaria: peach-like, the medieval name for knotweed
hydropiperoides: hydro for "water;" piper for "pepper," oides for "like"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect to sprawling, perennial, up to 40" tall forb; stems with nodes always hairy; from rhizomes
Flower: white-green to pink, petals and petal-like sepals connected at the base; inflorescence thin, erect clusters often interrupted toward the base on usually hairy stalks jointed at the top
Fruit:black, shiny, smooth, oval, dry seed with 3-rounded angles and concave sides
Leaf:alternate, lance-like to linear, mostly less than 1 1/2" wide
Habitat: wet; beaches, marshes, shallows

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

Flora of North America (off site)
Persicaria hydropiperoides (Michx.) Small var. breviciliata (Fernald) C.F.Reed
Persicaria hydropiperoides (Michx.) Small var. euronotora (Fernald) C.F.Reed
Persicaria hydropiperoides (Michx.) Small var. opelousana (Riddell) J.S.Wilson
Persicaria opelousana (Riddell ex Small) Small
Persicaria paludicola Small
Persicaria persicarioides (Kunth) Small
Polygonum hydropiperoides Michx.
Polygonum hydropiperoides Michx. f. strigosum (Small) Stanford
Polygonum hydropiperoides Michx. var. adenocalyx (Stanford) Gleason
Polygonum hydropiperoides Michx. var. asperifolium Stanford
Polygonum hydropiperoides Michx. var. breviciliatum Fernald
Polygonum hydropiperoides Michx. var. bushianum Stanford
Polygonum hydropiperoides Michx. var. digitatum Fernald
Polygonum hydropiperoides Michx. var. euronotorum Fernald
Polygonum hydropiperoides Michx. var. hydropiperoides
Polygonum hydropiperoides Michx. var. opelousanum (Riddell ex Small) W.Stone
Polygonum hydropiperoides Michx. var. psilostachyum H.St.John
Polygonum hydropiperoides Michx. var. strigosum Small
Polygonum opelousanum Riddell ex Small
Polygonum opelousanum Riddell ex Small var. adenocalyx Stanford
Polygonum persicarioides Kunth

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