PROTECTION STATUS: Threatened
YEAR LISTED: 1998
CRITICAL HABITAT: 652 acres in Los Angeles and San Diego counties
RECOVERY PLAN: 1998
RANGE: Disjunct and restricted populations from the Santa Clarita region of Los Angeles County, east to Riverside County, and south through San Diego County and Baja California, Mexico
THREATS: Habitat destruction and fragmentation from agricultural development, wetland alteration, off-road vehicles, grazing, weed abatement, fire suppression, pipeline construction, and invasive species
POPULATION TREND: Fewer than 30 populations of spreading navarretia remain in the United States, with nearly 60 percent of these concentrated in just three California locations: Otay Mesa in southern San Diego County, along the San Jacinto River in Riverside County, and near Hemet in Riverside County. The majority of populations contain fewer than 1,000 individuals and occupy less than an acre of habitat. The U.S. Fish and Wildlife Service estimates that the species is found on less than 300 acres of total habitat in the United States. In Mexico, it occurs in only about 10 populations.