Much like no. 12 [Polygonum ramosissimum Michx.], and intergrading with it; plants nearly homophyllous; lvs rounded or obtuse at the tip, conspicuously veined, becoming rugose-veiny when dry; fls not so strongly restricted to the stem-tips, scarcely exsert, on pedicels less than 2 mm; 2n=60. Brackish shores and marshes along the coast, from Me. and Va.; less commonly and irregularly w. to Oreg., Calif., and N.M.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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