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