Can Lysichiton and Lewisia both be found in America?
Lewisia Lewisia is a plant genus, named for Meriwether Lewis who encountered the species in 1806. The native habitat of "Lewisia" species is north facing cliffs in the western part of North America. Local Native Americans ate the roots, which have also been used to treat sore throats.
Micromeria douglasii Clinopodium douglasii, or yerba buena, is a rambling aromatic herb of western and northwestern North America, ranging from maritime Alaska southwards to California. The plant takes the form of a sprawling, mat-forming perennial, and is especially abundant close to the coast. The name "yerba buena" derives from Spanish for "good herb" and is applied to various other plants. Molecular evidence places the species within the Clinopodium complex rather than Micromeria.