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    • Toxicodendron

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Creative Commons Flickr Photos Tagged "Toxicodendron."
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Recent observations

Photos / Sounds

What

Poison Ivy Toxicodendron radicans

Observer

greglasley

Date

November 24, 2014

Description

Poison Ivy gets a nice yellow color in the fall

Photos / Sounds

What

Poison Ivy Toxicodendron radicans

Observer

coleharken2

Date

November 3, 2014

Description

Woody vine or shrub known for causing itching and irritation of skin. The deciduous leaves are trifoliate with three almond-shaped leaflets. Leaves are green that turn bright red in the fall. The flowers are typically inconspicuous and are located in clusters. The fruit type is a berry-like drupe with a grayish-yellowish color.

Tags

Photos / Sounds

Square

What

Poison Ivy Toxicodendron radicans

Date

October 20, 2012

Photos / Sounds

Square

What

Poison Ivy Toxicodendron radicans

Observer

sschratz87

Date

October 17, 2014

Description

Identified by growth form (woody, hairy vine), leaf arrangement and grayish, globose drupes. Confirmed via Smiths Field key and Google Images

Tags

Photos / Sounds

Square

What

Poison Ivy Toxicodendron radicans

Observer

jenniferwilcox

Date

October 18, 2014

Description

Trifolate leaves on slender stemmed, climbing vine. Small white berries in clusters. Vine climbing up large oak tree (Quercus sp.).

Tags

Photos / Sounds

No photos or sounds

What

Western Poison Oak Toxicodendron diversilobum

Observer

dreierj

Date

March 18, 1986

Photos / Sounds

What

Poison Ivy Toxicodendron radicans

Observer

benwilliams

Date

November 2, 2014

Description

The deciduous leaves of T. radicans are trifoliate with three almond-shaped leaflets. Leaf color ranges from light green (usually the younger leaves) to dark green (mature leaves), turning bright red in fall; though other sources say leaves are reddish when expanding, turn green through maturity, then back to red, orange, or yellow in the fall. The leaflets of mature leaves are somewhat shiny. The leaflets are 3–12 cm (1.2–4.7 in) long, rarely up to 30 cm (12 in). Each leaflet has a few or no teeth along its edge, and the leaf surface is smooth. Leaflet clusters are alternate on the vine, and the plant has no thorns. Vines growing on the trunk of a tree become firmly attached through numerous aerial rootlets. The vines develop adventitious roots, or the plant can spread from rhizomes or root crowns. The milky sap of poison ivy darkens after exposure to the air.

Photos / Sounds

Square

What

Poison Ivy Toxicodendron radicans

Observer

brentano

Date

November 10, 2014

Description

Beautiful fall coloration.

Photos / Sounds

Square

What

Western Poison Oak Toxicodendron diversilobum

Observer

ivyli

Date

November 16, 2014 12:29 PM PST

Photos / Sounds

Square

What

Pacific Poison Oak Toxicodendron diversilobum

Observer

ericmu73

Date

November 16, 2014 12:29 PM PST

Photos / Sounds

What

Poison Ivy Toxicodendron radicans

Observer

nikaylahughes

Date

September 12, 2014

Description

Vine growing up a medium sized tree. About 1 and 1/2 to 2 inches in diameter vine, adventitious roots attach vine to tree. Bright green leaves with a few bright yellow or red. Berries clustered midway on visible branches, yellowish in color

Tags

Photos / Sounds

What

Western Poison Oak Toxicodendron diversilobum

Observer

dominic

Date

November 16, 2014

Description

Found some with some leaves still on it. Found it growing on the side of the Nature Trail.

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Description from Wikipedia

Toxicodendron a genus of flowering plants in the sumac family, Anacardiaceae. It contains woody trees, shrubs and vines, including poison ivy, poison oak, and the lacquer tree. All members of the genus produce the skin-irritating oil urushiol, which can cause a severe allergic reaction. The generic name is derived from the Greek words τοξικός (toxikos), meaning "poison," and δένδρον (dendron), meaning "tree".

No range data available.