Boehmeria spicata is an East Asian plant found at forest edges, with lower stems that become woody even though it looks like an herb. Its reddish stems and paired, diamond-shaped leaves with long, pointed tips help identify it.
False-nettle usually has oval or lance-shaped leaves. B. spicata has more diamond-shaped leaves with long, pointed tips; check several leaves because their shapes can vary.
Why they get mixed upBoth have paired, toothed leaves and small flowers on spikes.