Scientific NameAlternanthera philoxeroides
Synonyms (former Scientific Names):
Alligator weed is an aquatic or terrestrial perennial weed. It forms a mat of tangled stems up to 1 meter long.
Leaves are arranged oppositely and are elliptic in shape. They are fused directly to the stem (sessile). Leaf margins are entire.
The stems of alligatorweed are hollow.
Flower Seed Head
The flowers are white and up to 1.5mm wide. This weed does not produce any type of fruit or seed.
This weed is found covering waterways or shorelines.
prostrate and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
Stem Cross Section
round or oval