Stems rooting at the nodes, 1-3 dm, forming mats; lvs petioled, round-ovate, 1-2 cm; fls mostly terminal, the common peduncle shorter than the subtending lvs; cor 10-14 mm occasionally with 3, 5, or 6 lobes; fr insipid, 5-8 mm thick, crowned with the short sep; 2n=22. Woods; N.S. to Ont. and Minn., s. to Fla. and Tex. May-July.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.