Warren Lambert Wagner (born February 8, 1950, Las Cruces, New Mexico) is an American botanist, a curator of botany, and a leading expert on Onagraceae and plants of the Pacific Islands, especially plants of the Hawaiian Islands.
Biography.
Wagner attended New Mexico State University from 1968 to 1972 and then transferred to the University of New Mexico. There he graduated in 1973 with a bachelor of science degree in biology and in 1977 with a master's degree in botany, after working as a herbarium curatorial assistant and a research assistant supported by a series of grants. His master's thesis is on the flora of the Animas Mountains in southwestern New Mexico. From 1977 to 1981 he was a graduate student at Washington University in St. Louis. His 1981 doctoral dissertation, supervised by Peter Raven, is entitled "A systematic and evolutionary study of the "Oenothera caespitosa" species group, Onagraceae". From 1981 to 1982 Wagner was a postdoc at Missouri Botanical Garden. In 1982 despite never having visited the Hawaiian Islands and never having studied the flora of those Islands, he was appointed to a position at Honolulu's Bishop Museum to work on a comprehensive, new flora of the Hawaiian Islands. In 1983 he became the leader of the project. In 1990 the University of Hawaii Press published the flora in two volumes with the title "Manual of the Flowering Plants of Hawai'i". The lead author was Wagner, but he had two coauthors and 50 contributors.
 ;templatestyles src="Template:Blockquote/styles.css" / ;The previous flora (Hillebrand, 1888) was out of date, and subsequent contributions featured varied species concepts and were published in scattered places. The 1990 "Manual" (rev. 1999) was a major factor in permitting botanists to explore the amazing insular evolutionary phenomena that the Hawaiian flora contains. Wagner’s work on islands continued with the Marquesas, where cladistic studies and contributions using DNA permitted an understanding of the biogeographic nature of the remote and neglected archipelago.
Since 1988 when he was hired as curator of Pacific botany, Wagner has worked at the Department of Botany of the Smithsonian Institution's National Museum of Natural History. From 1992 to 1997 he was the department chair. He has done botanical research in the Hawaiian Islands, the Marquesas, and Taiwan, as well as Mexico, Canada, and the mainland U.S.A. He is the author or coauthor of over 100 scientific articles. His articles have been published in the "Annals of the Missouri Botanical Garden", the "American Journal of Botany", "Biochemical Systematics and Ecology", the "Botanical Journal of the Linnean Society", Brittonia, "Ecology and Evolution", "Frontiers in Plant Science", the "International Journal of Plant Sciences, "the "Journal of Biogeography", "Novon", "PhytoKeys", "Selbyana", "Systematic Botany", and "Taxon".
 ;templatestyles src="Template:Blockquote/styles.css" / ;
 ;templatestyles src="Template:Blockquote/styles.css" / ;Wagner ... worked with a husband-and-wife team of UC Irvine botanists, Ann Sakai and Stephen Weller, to study "Schiedea", a genus of shrubs and vines that are in the carnation family. The genus has an unusual trait—it contains both bisexual and asexual plants.
In June 1993 in Boulder, Colorado, he married Lucy Carol Julian. They have a son and a daughter.
Selected publications.
 ;templatestyles src="Botanist/styles.css"/ ;The standard author abbreviation W.L.Wagner is used to indicate this person as the author when citing a botanical name.