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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  Parietaria pensylvanica Muhl. ex Willd. image
Photographer: Kitty Kohout           

Christopher Noll

Christopher Noll
Family Urticaceae
Parietaria pensylvanica Muhl. ex Willd.
Pennsylvanian pellitory
Parietaria: derives from Latin parietarius, "of walls," which descends from Greek paries, "a wall," where the plant likes to grow, as Pliny knew when he described it
pensylvanica: of Pennsylvania
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: small, erect, annual, 4"-16" tall forb with non-stinging, fine hairs
Flower: green, 4-parted, 1/8" wide; inflorescence few-flowered, short clusters from the middle and upper leaf axils; blooms May-Sept.
Fruit:shiny, oval, dry seed
Leaf:stalked, thin, lance-like, alternate, toothless, no stipules
Habitat: dry to moist; woods, disturbed sites, sidewalk cracks, streambanks

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

Flora of North America (off site)
Parietaria obtusa Rydb. ex Small
Parietaria occidentalis Rydb.
Parietaria pensylvanica Muhl. ex Willd. var. obtusa (Rydb. ex Small) Shinners
Parietaria pensylvanica Muhl. ex Willd. var. pensylvanica

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