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 arifolia (L.) Haraldson image
Photographer: Merel R. Black           

Botanical Illustration

Merel R. Black

Merel R. Black

Merel R. Black

Robert W. Freckmann

Robert W. Freckmann
Family Polygonaceae
Persicaria arifolia (L.) Haraldson
halberd-leaved tear-thumb
Persicaria: peach-like, the medieval name for knotweed
arifolia: leaves like Arum
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: climbing or tangling, annual, 3'-6' long, slender forb; 4 -angled stems very prickly
Flower: pink to white, 5-parted, 3/8" long, egg-shaped, stalkless, petals and petal-like sepals; inflorescence short, rounded, uninterrupted clusters both terminal and from the leaf axils; blooms Aug.-Sept.
Fruit:dry seed
Leaf:alternate; triangular with wide, flaring lobes at the base
Habitat: wet; marshes, swamps, wet meadows
Notes: very similar to P. sagittata except for shape of leaf

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

Flora of North America (off site)
Polygonum arifolium L.
Polygonum arifolium L. var. lentiforme Fernald & Griscom
Polygonum arifolium L. var. pubescens (R.Keller) Fernald
Polygonum sagittatum L. var. pubescens Keller
Tracaulon arifolium (L.) Raf.

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