Here we go, everything from the page but Herbicide stuff
Annual. Reproducing by seeds, alternate and pointed.
Ascending to erect, 3 feet tall swollen at nodes, brancihng and nearly hairless.
Alternate, hairless except for closelying stiff hairs on the leaf margins leaves are pointed.
Flower or Seed Head
Flowers in dense, erect spikes, bright pink, both sexes are borne in the same flower head.
Found throughout the eastern and central USA as far west as south eastern Wyoming; in cultivated fields, non-cropland areas, along ditch banks, damp shores and thickets.
There you have it, thats what the Weed Id booklet says, so I guess its true...
Idk if you what you wanted to know, but thats all the BIO stuff.