Robert W. Freckmann Herbarium


  Polygonum aviculare L. subsp. buxiforme (Small) Costea & Tardif image
Photographer: from USDA Plants website           
Family Polygonaceae
Polygonum aviculare L. subsp. buxiforme (Small) Costea & Tardif
box knotweed, boxwood 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
buxiforme: bux for "box" and forme for "form" or "shape"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: sprawling to matting annual forb; stems with many branches
Flower: white to pink edges, 5-parted, petals and petal-like sepals joined at the base and hooded, 3 outer longer than other 2; inflorescence small clusters from the leaf axils
Fruit:dark brown, dull, dry seed
Leaf:alternate, flat, oblong, jointed at the base
Habitat: marsh edges, dunes; in sandy soil
(Glossary)

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

Flora of North America (off site)
Synonyms 
Polygonum aviculare L. var. crassifolium Lange
Polygonum aviculare L. var. littorale (Link) Mert.
Polygonum buxiforme Small
Polygonum littorale Link

         
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