Monster Poison Ivy Leaves

Monster Poison Ivy Leaves

There are a few things to learn from this photo of your poison-ivy-nerd webmaster pointing at a poison ivy leaf as big as his head:

The leaves can get very big, typically in darker areas where they need to gather more light.

Fifty years ago we never saw leaves this large – the 25% increase in CO2 in the atmosphere is allowing them to grow this large, although it is not clear why all plants are not taking advantage of the extra CO2.

The baby leaves still show up red, which seeems to be a protection against insects

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