eastern poison ivy
Scientific NameToxicodendron radicans
Other Common Names:
Synonyms (former Scientific Names):
Its stems are slender, from gray to red-brown, sparingly pubescent or glabrous, slender aerial roots present and older growth becomes densely covered and hairy in appearance; buds are stalked, naked, fuzzy brown, 1/4 inch long.
The leaves are toxic and have 3 leaflets, 7 to 10 inches long. These leaflets are ovate and irregularly toothed, shiny green above, and paler below.
Poison Ivy is recognized by its 3-parted leaves. It also stands out in the fall, when the leaves turn brilliant shades of red and orange.
Flower Seed Head
Small and yellowish-green. It appears in clusters, present late spring to early summer.
Greenish white, round, 1/4 inch in diameter, borne in a hanging cluster, ripe in late summer and persist through winter.
May be present as a low (6 to 18 inches), spreading on the forest floor, as a climbing vine, or as a bush.
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval