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monster poison ivy leaf

This photo was sent by a viewer. And this might be the largest poison ivy leaf we have ever seen! Could be 6 x 8 inches, which is enormous.

Because of vastly increased CO2 in the atmosphere, poison ivy is growing larger (and more potent). 

TAGS: large
June 18, 2018 - 1:44pm
poison ivy leaves alternating

A viewer sent in this photo of a poison ivy (or possibly poison oak) vine.

What is striking about this image is how the leaves of three come off the main stem clearly alternating left and right. You rarely get such a clear view of how this works since the leaves usually hide the stems.

TAGS: alternating
June 10, 2018 - 7:46pm
poison ivy on a fence

This photo was sent in by a viewer who wanted to know for sure if this monster was poison ivy.

The answer is... YES IT IS POISON IVY!!!

TAGS: fence
May 30, 2018 - 8:02pm
Black ring of poison ivy vine

This is a photo of a poison ivy vine that was chainsawed along with the tree that it was climbing upon.

TAGS: black sap
May 22, 2018 - 11:40pm
Virginia Creeper versus poison ivy

Here we have two vines that are constantly mistaken for each other, and for good reason: they often grow side by side, or even intertwined.

On the left are two 5-leaflet Virginia creeper leaves, coming from a thin vine. 

May 12, 2018 - 4:23pm
spring poison ivy

I had a conversation with the fellow who runs one of America's leading poison ivy control services.

He grew up very much an outdoor kid, had constant contact with poison ivy, while hunting, fishing and just generally being an All-American kid.

TAGS: age
May 7, 2018 - 10:08am

It has been a cold, late spring up here in New England, but today will reach the mid 80s, so plants will be exploding into full leaf.

TAGS: spring
May 2, 2018 - 10:01am
5-leafed poison ivy

It has been an absolute rule for over a century: "Leaves of three, let them be." 

Poison ivy has only three leaves (actually leaflets) in a group. And that is still true about 99.9999% of the time.

TAGS: Jelesko, 5-leaf
April 13, 2018 - 11:47am
LARGE poison ivy

As spring rolls around, poison ivy is one of the first plants to emerge. Spring leaves are usually red, but many new leaves are red, so that's not enough to go on. See our ALWAYS-NEVER criteria for deciding if a plant is poison ivy.

March 28, 2018 - 11:22am
poison ivy stump

When you cut down a tree, the sudden presence of sunlight encourages poison ivy vines to grow into the gap.

Here is a stump where the  white snow highlights how the vines, with nowhere to climb, start reaching in all directions, looking for something else to climb up.

TAGS: stump, winter
March 14, 2018 - 9:39pm

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