Polygonaceae
Polygonum persicaria

Lady's-Thumb Knotweed

Erect, shiny, smooth. Stem branching from base, sometimes swollen above joints. Bracts on stems at leaf joints papery and fringed. Leaves lance-shaped, pointed at tips, usually with a dark spot in the middle, dots on underside. Flowers atop shiny stalks in dense uninterrupted spikes, pink or rarely white. A weedy species most often found on moist places and disturbed soils at low to mid elevations.

  • Rarity: Common
  • Flowering Time: All Summer
  • Life Cycle: Annual, Perennial
  • Height: 8--36 inches
  • Habitat: Meadow, Bog/Fen/Wetland, Disturbed
  • Found In: Olympic NP, N Cascades NP
  • Native: No