Polygonum amphibium - Water Smartweed

  Family: Polygonaceae Growth Form: Forb/Herb
  Hydro Zone: -12 to 3 NWC: OBL
  C-value: 4 Max Height: 3
  Hardiness Zones: -23dF Light: Thrives in full sun
  Bloom: 10 June- 1 Oct Collect Seed: Fall
   
  Similar Species:
   
  Distinguishing Characteristics: Aquatic-adapted; Floating branches with alternate, smooth, eliptical leaves with rounded tips; Flowers arranged in oval/connical cluster 1/5-4 cm.
 
Early Growth

Mid Growth

 
Full Growth

Flower

 
Seed

Distinguishing Characteristic