Endangered and Threatened Wildlife and Plants; Endangered Species for Prostrate Milkweed and Designation of Critical Habitat

We, the U.S. Fish and Wildlife Service (Service), propose to list the prostrate milkweed (Asclepias prostrata), a plant species from Texas, as an endangered species and designate critical habitat under the Endangered Species Act of 1973, as amended (Act). This determination also serves as our 12-month finding on a petition to list the prostrate milkweed. After a review of the best available scientific and commercial information, we find that listing the species is warranted. Accordingly, we propose to list the prostrate milkweed as an endangered species. If we finalize this rule as proposed, it would add this species to the List of Endangered and Threatened Plants and extend the Act's protections to the species. We also propose to designate critical habitat for the prostrate milkweed under the Act. In total, approximately 691.3 acres (279.8 hectares) in Starr and Zapata Counties, Texas, fall within the boundaries of the proposed critical habitat designation. We also announce the availability of a draft economic analysis of the proposed designation of critical habitat for prostrate milkweed.