Etymology: Persicaria: peach-like, the medieval name for knotweed
Plants: erect to sprawling, annual, up to 32" tall, mostly smooth forb often with many branches; stems not glandular, nodes with a few very short bristles; taprooted
Leaves: alternate, narrowly lance-like with a dark blotch near the center
Flowers: pink to rose, 5-parted, 1/8" long, petals and petal-like sepals connected at the base; inflorescence 1/2" - 1 1/2" dense, straight, cylindrical, spike-like clusters 1/4"-1/2" thick arching on a stalk jointed at the top; blooms July-Sept.
Fruits: black, smooth, shiny, dry, broadly-oval seed
Habitat: wet to moist; disturbed sites such as gardens
Conservation Status: Introduced - naturalized