Robert W. Freckmann Herbarium

Attention

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 http://wisflora.herbarium.wisc.edu/. 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.

Please direct any comments to wisconsin.state.herbarium@gmail.com.

Thank you.


  Polygonum ramosissimum Michx. subsp. ramosissimum image
Photographer: Emmet J. Judziewicz           

Emmet J. Judziewicz

Emmet J. Judziewicz

Emmet J. Judziewicz
Family Polygonaceae
Polygonum ramosissimum Michx. subsp. ramosissimum
bushy knotweed
Polygonum: derived from the Greek words polys, "many," and gonu, "knee or joint," hence "many joints" because of the thickened joints on the stem
ramosissimum: branching the most
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect or sprawling, annual, 12"-40" tall forb; stems with several branches
Flower: greenish, 5-parted, 1/8" long, with a deep cleft, petals and petal-like sepals joined at the base with the outer 3 longer than the inner 2; inflorescence with 1-3 flowers in erect clusters from the upper nodes
Fruit:blackish, smooth, shiny, dry, oval, 3-angled seed
Leaf:alternate, narrow, flat, leaves on branches much smaller than those on the stem, jointed at the base
Habitat: moist; shores
(Glossary)

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

Flora of North America (off site)
Synonyms 
Polygonum allocarpum S.F.Blake
Polygonum atlanticum (B.L.Rob.) E.P.Bicknell
Polygonum autumnale Brenckle
Polygonum exsertum Small
Polygonum interius Brenckle
Polygonum ramosissimum Michx.
Polygonum ramosissimum Michx. f. atlanticum B.L.Rob.
Polygonum ramosissimum Michx. var. ramosissimum
Polygonum triangulum E.P.Bicknell

         
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