Polygonum glaucum Nutt.

• Authority

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

• Family

  Polygonaceae

• Scientific Name

  Polygonum glaucum Nutt.

• Description

  Species Description - Annual to 3(–7) dm, homophyllous, diffusely branched, prostrate or nearly so, commonly with upturned branch-tips, very pale and glaucous; lvs lanceolate or narrowly elliptic, 1–3 cm × 2–8 mm; ocreae conspicuous, mostly 7–10 mm (at least on the lower nodes), silvery-scarious distally, the lower half becoming brown, with 8–16 usually scabrellous nerves; pedicels included in the ocreae; mature perianth 3–4 mm, divided nearly to the base, the lobes loosely spreading, obovate-oblong, obtuse or broadly rounded above, with green midrib and white to pink margins; achene 3–4 mm, exsert, glossy, brown to blackish; 2n=40. Sandy beaches; Mass. to Ga. (P. maritimum, misapplied)

• Common Names

  seaside knotweed