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CENTER for BIOLOGICAL DIVERSITY Because life is good
ABOUT ACTION PROGRAMS SPECIES NEWSROOM PUBLICATIONS SUPPORT

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ENDANGERED SPECIES ACT PROFILE

PROTECTION STATUS: Endangered

YEAR LISTED: 1998

CRITICAL HABITAT: None

RECOVERY PLAN: None

RANGE: Western Riverside County, California

THREATS: Increased urbanization, agricultural disking, off-road vehicle use, alteration of hydrology, trampling by livestock, manure and sludge dumping, and competition from nonnative species

POPULATION TREND: The San Jacinto Valley crownscale experienced a severe decline between 1992 and 1999, when it lost 70 percent of its population, unfortunately a trend that continues today. The four remaining populations are located in the San Jacinto Wildlife Area, the floodplain of the San Jacinto River, the Upper Salt Creek vernal pool, and Alberhill Creek. Because floodwaters carry crownscale seeds over long distances, population ranges may shift from year to year.

Photo by Ileene Anderson