Eastern Poison Ivy
Toxicodendron radicans · Anacardiaceae (Cashew or Sumac family)
AI-generated identification · may be incorrect
Leaf Morphology
Leaf Type
Compound (trifoliate with three leaflets), deciduous
Shape
Ovates to elliptical leaflets, terminal leaflet has a distinct longer stalk while lateral leaflets are nearly sessile; asymmetric bases
Margin
Variable; margins can be entire, coarsely toothed, or distinctly lobed
Arrangement
Alternate along the woody vine or stem
Venation
Pinnate venation with a prominent pale midrib and branching lateral veins on each leaflet
Key Features
The golden rule of 'leaves of three, let them be' applies directly here. Key identifiers include the compound leaves with three leaflets, the middle leaflet having a longer stalk than the two side leaflets, and often a reddish tint on the leaf stems.
Description
Toxicodendron radicans is a notorious woody vine or low shrub featuring its trademark groups of three leaflets. The plant can trail along the ground, climb aggressively up tree trunks using aerial rootlets, or stand free as a shrub. Foliage transforms into vibrant shades of yellow, orange, and red in the autumn before dropping.
Habitat
Thrives in forest edges, woodlands, roadside thickets, fence rows, and disturbed soils; highly adaptable to both full sun and partial shade
Native Range
Native to eastern and central North America, extending from Nova Scotia down to Florida and west to Texas and into parts of Mexico