October 13, 1998 – The U.S. Fish and Wildlife Service listed the San Jacinto Valley crownscale as endangered.
November 15, 2001 – The Center and the California Native Plant society filed suit against the Service for its failure to designate critical habitat for eight plant species, including the San Jacinto Valley crownscale.
July 1, 2002 – The U.S. District Court for the Southern District of California ordered the Service to reconsider its findings and to publish a ruling on critical habitat for the San Jacinto Valley crownscale.
October 6, 2004 — The Service published a proposal stating that 15,232 acres of California land were essential to the preservation of the San Jacinto Valley crownscale.
October 13, 2005 — The Service published a final rule designating no critical habitat for the San Jacinto Valley crownscale.
August 28, 2007 – The Center filed a notice of intent to sue the Bush administration for wrongful Endangered Species Act decisions affecting 55 species, including the decision not to designate critical habitat for the San Jacinto Valley crownscale.
October 2, 2008 – The Center sued the Bush administration over six politically tainted Endangered Species Act decisions, including the decision to designate not a single acre of habitat for the crownscale.