(Meisn.) Arcang.
Pronunciation: pol-IG-on-um
Common name: Common knotweed
Family: Polygonaceae (Buckwheat)
Habitat: Disturbed and waste places throughout
California to 7500', introduced from Europe
Blooming period: Spring and summer
Click for Latin name derivations: 1) Polygonum
2) arenastrum
Formerly Polygonum arenastrum