Increasingly warm temperatures also could mean the end of the eastern cottonwood, according to "The Gardener's Guide to Global Warming."
"Everything being equal, these plants won't thrive and will shift north," said Patty Glick, the report's author and senior global warming specialist for the National Wildlife Federation.
While conditions could change, Glick and others say projected increasing temperatures also could wipe out cool-weather grasses, such as Kentucky bluegrass, and many fescues that cover lawns in the region.