Pennsylvania Smartweed

(Polygonum pensylvanicum L.)

Polygonaceae (Smartweed Family)

▲▼ mature plants, showing flowers

▲▼ inflorescences

▲▼ flowers

▲▼ stems and ochrea

Pennsylvania Smartweed: (pp. 490-491, Weeds of the Great Plains; pp. 280-281, Weeds of the Northeast)

*    most common and aggressive of the group

*    usually much-branched summer annual, 1-3' tall

*    terminal flower spikes have pink to white flowers

*    stems green to reddish in color; leaves green, lanceolate