Species on page - 2 species in 1 genus depicted

Poison oak (Toxicodendron diversilobum)

Poison ivy (Toxicodendron radicans)

Poison oak (Toxicodendron diversilobum)

Leaves of three - poison distribution

Toxicodendron diversilobum
October 26, 2013
Photographing Nature class

Leaves of three

Poison Oak
Jasper Ridge
October 25, 2014

Poison oak emerging

San Bruno Mountain
March 2, 2013 with Photographing Nature

The Stanford Quad

Toxic tenant in the quad

Poison oak (Toxicodendron diversilobum)
April 18, 2014

Poison berries

Poison oak (Toxicodendron diversilobum)
Family: Anacardiaceae
Jasper Ridge
June 5, 2014

Poison oak berries

Poison oak (Toxicodendron diversilobum formerly Rhus diversiloba)
Family: Anacardiaceae
Order: Sapindales
Jasper Ridge
October 30, 2016
Northern California Science Writers Association (NCSWA) docent walk
Canon 7dmark2

Poison oak (Toxicodendron diversilobum)
Family: Anacardiaceae
Firth Canyon trail
San Bruno Mountain
Nature Through Photography class trip
August 8, 2021
Canon 7D MarkII

Año Nuevo

Doubly poisonous

Amanita muscaria and poison oak
April 13, 2014

Poison oak afflicted

Poison oak (Toxicodenron diversiloba)
Jasper Ridge
October 14, 2017
with Photographing Nature class
Canon rebel T5i

Jeff's itchin' to go

Jasper Ridge Open House
May 12, 2018
Canon 5Dmark2

Squirrel getting POed

Squirrel ( )
Poison oak (Toxicodenron diversiloba)
Family: Anacardiaceae (cashew, mango, poison oak, toxicodendron family)
Natural Bridges, Santa Cruz
October 26, 2018
Canon 7Dmark2

Poison oak (Toxicodendron diversilobum)
Family: Anacardiaceae (cashew, mango, poison oak, toxicodendron family)
Stanford Dish
September 28, 2021
Canon 7Dmark2

Poison ivy (Toxicodendron radicans)

Poison ivy (Toxicodendron radicans)
Family: Anacardiaceae (cashew, mango, poison oak, toxicodendron family)
The Great Swamp, New Jersey
October 6, 2021
Canon R5

Poison ivy (Toxicodendron radicans)
Family: Anacardiaceae (cashew, mango, poison oak, toxicodendron family)
Mount Beacon, New York
October 13, 2021
Pixel 5

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