Palmer amaranth – current state-level distribution in the US

Palmer amaranth is native to the southwestern United States, and has been recognized as a problematic weed in the southwest and southeastern US for many years. Each year, this species seems to move further north. I’ve been trying to keep an accurate state-level distribution map for this weed, and thought I’d post it here for anyone else who might be interested.   Data sources: PLANTS database (https://plants.usda.gov) California, Nevada, Utah, Arizona , Colorado, New Mexico, Nebraska, Kansas, Oklahoma, Texas, Wisconsin, …

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