Hoover's Umbrellawort, Hoover's Umbrella-wort, Hoover's Tauschia: Lomatium lithosolamans (Synonym: Tauschia hooveri) -
Leiberg's Umbrellawort, Leiberg's Umbrella-wort, Leiberg's Tauschia: Lomatium tenuissimum (Synonyms: Leibergia orogenioides, Lomatium orogenioides, Tauschia tenuissima) - Endemic to eastern Spokane County, WA and adjacent northern Idaho.