Tidestromia lanuginosa (Nutt.) Standl.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - A branching, prostrate or decumbent annual native to w. U.S., with broadly ovate to orbicular lvs 1–3 cm subtending small, axillary glomerules of small fls, is occasionally found in waste places along our w. border.