BOISE, Idaho (AP) — A small, flowering plant found only in southwest Idaho will again be listed as threatened under the Endangered Species Act.

The U.S. Fish and Wildlife Service on Monday announced the listing of slickspot peppergrass to take effect Sept. 16. The plant was originally listed in 2009 but Idaho Gov. C.L. "Butch" Otter filed a lawsuit challenging the decision.

In August 2012 a federal judge vacated the listing and ordered Fish and Wildlife to more clearly define what "foreseeable future" meant when discussing threats to the plant.

The agency in 2014 held comment periods on the definition of "foreseeable future" as well as the agency's determination the species needed federal protection. The listing could have ramifications for cattle ranchers who graze on public land where the plant is found.