Plan the perfect garden with our interactive tool →

Plants That Resemble Poison Oak

...
hiker image by Greg Pickens from Fotolia.com

Poison oak, or Toxicodendron diversilobum, is a plant found primarily in the western half of the United States, but also pops up in the eastern part as well. This diverse plant takes many forms and there are a number of plants that are confused for this pesky species. Prevent contact with poison oak by learning some of its many look-alikes. If you suspect you have come into contact with poison oak or develop an unidentified rash after handling an unknown plant, seek the advice of a licensed medical professional.

Mulberry

The red mulberry tree, Morus rubrus, and the white mulberry tree, Morus alba, are woody shrubs often mistaken for poison oak. The leaf structure of red and white mulberry is similar to that of poison oak, appearing with multi-lobed leaf margins that resemble the leaves of a true oak tree. The leaves of poison oak are shiny and dark green, whereas white and red mulberry trees have hairy, rough leaves that feel like sandpaper to the touch. Unlike poison oak, mulberry plants have polymorphic leaf structures. One branch may hold leaves that look entirely different from one another. Poison oak has the potential to grow as a woody vine and prefers wet to damp, shaded areas. Mulberry, on the other hand, prefers partial shade and damp to dry soil types.

  • Poison oak, or Toxicodendron diversilobum, is a plant found primarily in the western half of the United States, but also pops up in the eastern part as well.
  • The leaf structure of red and white mulberry is similar to that of poison oak, appearing with multi-lobed leaf margins that resemble the leaves of a true oak tree.

Blackberry

Poison oak is a tricky plant. In addition to growing as a shrub or tree, it also grows as a vine. Poison oak in vine form looks similar to blackberry vines. Blackberry vines of the Rubus genus are marked with five to seven leaflets along their thick, woody vines, similar to the configuration of the poison oak plant. As the plant matures, the leaves of blackberry plants break off into clusters of five to seven, leading to further confusion of these plants with poison oak. Poison oak is extremely adaptable and possesses a number of different leaf shapes, adding to the difficulty of discerning whether a thicket of blackberry vines are truly blackberries or poison oak. Poison oak vines do not possess the same thorns or brambles that blackberry vines are known for.

  • Poison oak is a tricky plant.
  • Blackberry vines of the Rubus genus are marked with five to seven leaflets along their thick, woody vines, similar to the configuration of the poison oak plant.

Poison Ivy

Not all poison oak lookalikes are harmless. Poison ivy resembles poison oak in more than just a physical way. Both plants contain the chemical urishiol, which causes the notorious itching rash. Poison oak and poison ivy both have three to five leaflets, though the leaflets of poison ivy tend to be more triangular and serrated than its cousin poison oak. The colors of both plants can range from green to yellow to red. Poison ivy produces white berries and poison oak produces white, tan and green berries. Both should be avoided, if possible.

  • Not all poison oak lookalikes are harmless.
  • Poison oak and poison ivy both have three to five leaflets, though the leaflets of poison ivy tend to be more triangular and serrated than its cousin poison oak.

Related Articles

Poisonous Plants in Oregon
Poisonous Plants in Oregon
How to Identify Leaves With a Red Stem
How to Identify Leaves With a Red Stem
Elderberry Leaf Identification
Elderberry Leaf Identification
Are There Other Plants That Look Like Rhubarb?
Are There Other Plants That Look Like Rhubarb?
How to Tell the Difference Between Virginia Creeper & Ginseng
How to Tell the Difference Between Virginia Creeper...
Five Leaflet Plant Identification
Five Leaflet Plant Identification
How to Kill Raspberry Plants
How to Kill Raspberry Plants
Itching Weed Identification
Itching Weed Identification
Ivy As a Ground Cover
Ivy As a Ground Cover
Passion Flower Poison
Passion Flower Poison
Ivy Plant Facts
Ivy Plant Facts
How to Identify Grape Plants
How to Identify Grape Plants
Vine Leaf Identification
Vine Leaf Identification
List of Holly Plants
List of Holly Plants
What Weed Killer Kills Buckthorn?
What Weed Killer Kills Buckthorn?
List of Shapes for Leaf Identification
List of Shapes for Leaf Identification
How to Remove Ivy Ground Cover
How to Remove Ivy Ground Cover
Tropical Plants in Fiji
Tropical Plants in Fiji
Garden Guides
×