Pale Smartweed Posted on August 29, 2012 by Axie Reply This is at the edge of the Charles. White blossoms, nodding. The stem has prominent joints. Buckwheat family. Native. Pale Smartweed, Dock-leaved Smartweed (Persicaria lapathifolia) Share this:Click to email a link to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to print (Opens in new window)Click to share on Pinterest (Opens in new window)