Reveal, J. L. (Professor Emeritus, University of Maryland, College Park, MD 20742-5815, and Honorary Curator, The New York Botanical Garden, Bronx, NY 10458; mailing address: 18625 Spring Canyon Road, Montrose, CO 81401-7906, U.S.A.; jr19@umail.umd.edu). Johanneshowellia (Polygonaceae: Eriogonoideae), a new genus from the Intermountain West. Brittonia 56: 299–306. 2004.—A new genus of Polygonaceae subfam. Eriogonoideae is established for what has long been known as Eriogonum puberulum. Named Johanneshowellia in honor of the late John Thomas Howell (1903–1994), a new combination, J. puberula, and a new species, J. crateriorum, are established. The common name Howell's-buckwheat is proposed for the group. The new genus differs from other members of the subfamily in having its involucral structure reduced to a spiral of four to seven bracts each of which is associated with a flower-bearing pedicel and a basal bractlet. In bud and early anthesis the outer two (rarely outer three) bracts may be partially connate, but typically become separate at full anthesis. The connate, ternate, foliar bracts at the base of the node act as a traditional Eriogonum-like involucre surrounding the branches of the inflorescence, the involucral bracts, and the flowers. Members of the new genus are found in the arid Intermountain West of the United States from Inyo Co., California, across Nevada to western Utah.