Pale Smartweed

(Polygonum lapathifolium)

Pale Smartweed (Polygonum lapathifolium L.)

Identification: Flowers usually green-white, although rarely pink, arranged in elongate flower spikes. Flower spikes commonly tapering toward the apex, and hanging downward. Stem green. Stem with nodes between the stem and a leaf swollen, and with a papery sheath. Sheath upper margin without hairlike spines. Leaves elongate, narrow, with a short petiole. Plant 1 to 6 feet in height.

Distribution: Throughout North America.

Habitat: Pale Smartweed is found in disturbed habitats, but most commonly around ponds and on wet ground.

Flowering period: July to November.

Similar Species: Pale Smartweed is a tall plant with greenish-white flowers. These two characters will usually distinguish it from either Lady's Thumb or Pennsylvania Smartweed. The sheaths of both Long-bristled Smartweed and Mild Water Pepper have the upper margin with hairlike spines. Pale Smartweed has a smooth upper margin.