Etymology: Pilea: for shape of larger sepal in fertile flower in original species which partly covers achene, like the pileus or "felt cap," of the Romans
Plants: erect, annual, 4"-20" tall, smooth forb with no stinging hairs; often forming colonies
Leaves: long-stalked, opposite, shiny but not very transparent
Flowers: green, 3- to 4-parted, 1/8"; inflorescence branched clusters (cyme) from the middle and upper leaf axils; blooms July-Sept.
Fruits: oval dry, dark purple seed with pale edges
Habitat: wet; in boggy, springy soil
Conservation Status: Native