Howellia aquatilisHowellia aquatilis Gray - Water howellwort. Present in the CalFlora Database (California distribution map). Listed by the U.S. FWS as threatened - the FWS local name is Water howellia and the FWS range is: U.S.A. (CA, ID, MT, OR, WA). FWS Listing information: volume 59 Federal Register 35864; July 14, 1994 (30K file). This taxon listed by the Center For Plant Conservation.