Lewisia. Lewisia Rediviva Pursh. Spathum. Chita. Bitter Root.—The roots of this plant, of the Fam. Portulacaceae, abundant in the Northwestern United States, are very widely used by the Indians as an article of food. For analysis and description, see A. J. P., 1889.
The Dispensatory of the United States of America, 1918, was edited by Joseph P. Remington, Horatio C. Wood and others.