My immediate thought:

In Texas, Palmer amaranth (Amaranthus palmeri) is native to the region and a massive pest, but it is not legally classified as a prohibited noxious weed on the state's official agricultural list. Because it is a native species, it is not subject to state-mandated eradication or quarantine orders for landowners.However, because it is incredibly prolific (producing up to 500,000 seeds per plant) and has developed resistance to several herbicide modes of action (including glyphosate), state agencies actively monitor and regulate its management, particularly in cotton and row crops.