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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.
The Lewis structure is used to give a two-dimensional representation of covalent molecules and ions. Lewis structures are based on using dots and lines to represent bonding and non-bonding valence electrons. Lines are used to represent bonding pairs of electrons. Dots are used to signify electrons. Lewis structures may also be used to show valence