Small-Spike False Nettle and Bog Hemp
False Nettle (Boehmeria cylindrica), a member of the Urticaceae (Nettle Family) is a herbaceous perennial that has green, yellow, or brown non-showy flowers originating from the axils of the leaves. The flowers bloom from July to October.
More information about False Nettle can be found on this blog post.
False Nettle grows in rich floodplains and other places that are wet or moist. This plant is found generally in the midwest and eastern United States and along the southern tier to California.
False nettle along with Canadian Clearweed (Pilea pumila) are the only two members of the Nettle Family that do not have have stinging hairs. False nettle does not have the clear stem of Canadian clearweed.