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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.eriwether Lewis is credited with the first discovery by a European or American of Lewisia, which was known to the local Native Americans as bitterroot. Lewis discovered the specimen in 1806 at Lolo Creek, in the mountain range that became known as the Bitterroot Mountains.
Lewis acid is a chemical species that reacts with a Lewis base to form a Lewis adduct. A Lewis base, then, is any species that donates a pair of electrons to a Lewis acid to form a Lewis adduct.For example, OH â and NH 3 are Lewis bases, because they can donate a lone pair of electrons.In the adduct, the Lewis acid and base share an electron pair furnished by the Lewis base.ewis acid is a chemical species that reacts with a Lewis base to form a Lewis adduct. A Lewis base, then, is any species that donates a pair of electrons to a Lewis acid to form a Lewis adduct.