Classification
Within iNaturalist.org

All Names

  • English
    • Pacific Poison Oak
    • Western Poison Oak
  • Scientific Names
    • Toxicodendron diversilobum
    • Rhus diversiloba
  • French
    • sumac de l'Ouest

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Recent observations

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

melonyv8

Date

May 1, 2016 09:36 AM PDT

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

inattie

Date

May 1, 2016 03:51 PM PDT

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

stella_lam

Date

January 15, 2016

Description

The leaves of this plant are typically bronze when first unfolding in February to March, bright green in the spring, yellow-green to reddish in the summer, and bright red or pink from late July to October.

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

stella_lam

Date

February 16, 2016

Description

Toxicodendron diversilobum (syn. Rhus diversiloba), commonly named Pacific poison oak or western poison oak, is a woody vine or shrub in the Anacardiaceae (sumac) family. It is widely distributed in western North America, inhabiting conifer and mixed broadleaf forests, woodlands, grasslands, and chaparral biomes. Like other members of the Toxicodendron genus, T. diversilobum causes itching and allergic rashes in many humans after contact by touch or smoke inhalation.

The leaves are divided into three (rarely 5, 7, or 9) leaflets, 3.5 to 10 centimetres (1.4 to 3.9 in) long, with scalloped, toothed, or lobed edges.

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

ericmu73

Date

March 8, 2016

Description

Poison, and there have 3 leaves

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

fengding

Date

April 18, 2016

Photos / Sounds

What

Pacific Poison Oak Toxicodendron diversilobum

Observer

tonyye

Date

January 19, 2016 01:49 PM PST

Place

(Somewhere...)

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

castanaresjohn

Date

January 5, 2016

Description

Poison oak plant found at the entrance of the trail

Tags

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

liuppppppppp

Date

May 1, 2016 05:58 PM PDT

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

ching

Date

February 16, 2016 09:14 AM PST

Place

(Somewhere...)

Photos / Sounds

What

Pacific Poison Oak Toxicodendron diversilobum

Observer

gyrrlfalcon

Date

May 1, 2016 04:46 PM PDT

Photos / Sounds

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What

Pacific Poison Oak Toxicodendron diversilobum

Observer

jdr

Date

May 1, 2016

Description

Observed near Madrone and Yellow Cat's Ear.

View all observations

Description from Wikipedia

Toxicodendron diversilobum, commonly named Pacific poison oak or western poison oak (syn. Rhus diversiloba), is in the Anacardiaceae family (the sumac family).

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Conservation Summary

No range data available.
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