U.S. Fish and Wildlife Service (Service), propose to designate critical habitat for Chamaecrista lineata var. keyensis (Big Pine partridge pea), Chamaesyce deltoidei ssp. serpyllum (wedge spurge), Linum arenicola (sand flax), and Argythamnia blodgettii (Blodgett's silverbush) under the ESA. In total, approximately 1,462 acres (592 hectares) for Big Pine partridge pea and approximately 1,379 acres (558 hectares) for wedge spurge, in Monroe County, Florida, and approximately 5,090 acres (2,060 hectares) for sand flax and 16,635 acres (6,732 hectares) for Blodgett's silverbush in Miami-Dade and Monroe Counties, Florida, fall within the boundaries of the proposed critical habitat designations. If finalized, this rule as proposed, would extend the Act's protections to the species' critical habitat. They also announced the availability of a draft economic analysis of the proposed designation of critical habitat for these four plant species. They will accept comments received or postmarked on or before 13 December 2022. POC is Lourdes Mena, Classification and Recovery Division Manager, USFWS, Florida Ecological Services Field Office, 7915 Baymeadows Way, Suite 200, Jacksonville, FL 32256; by tele 904-731-3134. (Federal Register 14 October 2022 [Proposed Rule] Pages 62502-62562)