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Glacier Survivors

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osageTake a peek around our area and you may notice some evidence from our past. Ice age plants are among us and have persisted over the past 10,000 years since the last glacier left Cincinnati.  Many of these plants hit their evolutionary prime during the beginning of the Cenozoic era when megafauna, which includes mammoths and giant sloths, roamed freely across North America. The fruit attracted these very large animals that would then eat it whole, travel very far distances and go to the bathroom, leaving the seed to grow in a new place with a bit of natural fertilizer to help it along. However, many of the plants that relied on megafauna for dispersal went extinct at the end of the Ice Age.  That being said, there are a few that have persisted despite the changes in environment.  This type of plant is called an evolutionary anachronism, meaning it is out of place in its current time period. Plants like the Osage-orange tree, with its large “monkey brain” fruit found a way to survive despite the fact that there are no animals that can eat and disperse it that way it was intended. Other plants like the Honey Locust, with its large seed pods and huge thorns are remnants of a time when the tree needed to protect itself from the huge animals who brushed up against them. These trees help to remind us of our history and reinforce the fact that the only thing that is constant in our world is change.