Eriastrum hooveri is a rare species of flowering plant in the phlox family known by the common name Hoover's woollystar.

It is endemic to the South Coast Ranges of California from San Benito to Los Angeles Counties, where it grows in grassy open habitat.

The inflorescence is a woolly cluster of narrow, leaflike bracts laced with webby fibers.

This plant was considered to be in serious jeopardy in the 1980s when many of its populations, most of which occurred on private and unprotected land, were in immediate danger of being destroyed by one or more threats, including conversion of the land for agricultural use, petroleum drilling, development for housing, grazing, agricultural pollution, invasive plants, flooding, and fire suppression.

Several companies that own land where the plant occurs, such as that in the Lost Hills Oil Field, have put protection measures in place.