Guy L. Nesom (born August 2, 1945)''U.S. Public Records Index'' Vol 2 (Provo, UT: Ancestry.com Operations, Inc.), 2010. is an American writer and botanist. Nesom received his Ph.D. in systematic botany from the

University of North Carolina The University of North Carolina is the multi-campus public university system for the state of North Carolina. Overseeing the state's 16 public universities and the NC School of Science and Mathematics, it is commonly referred to as the UNC Sy ...

in 1980, and has since contributed much to the fields of botanical nomenclature, systematics, and evolution. His most notable contributions are probably his works on the

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

, with several papers published throughout the 1990s that argued for multiple generic names to replace the single

polyphyletic A polyphyletic group is an assemblage of organisms or other evolving elements that is of mixed evolutionary origin. The term is often applied to groups that share similar features known as homoplasies, which are explained as a result of converg ...

name ''

Aster Aster or ASTER may refer to: Biology * ''Aster'' (genus), a genus of flowering plants ** List of ''Aster'' synonyms, other genera formerly included in ''Aster'' and still called asters in English * Aster (cell biology), a cellular structure shap ...

'', and his recent and ongoing contributions to the

Flora of North America The ''Flora of North America North of Mexico'' (usually referred to as ''FNA'') is a multivolume work describing the native plants and naturalized plants of North America, including the United States, Canada, St. Pierre and Miquelon, and Greenla ...

project. Several plant species have been named for Nesom, such as ''

Zeltnera nesomii ''Zeltnera'' is a genus of flowering plants in the gentian family. It was erected in 2004 when the genus ''Centaurium'' (the centauries) was split. Genetic analysis revealed that ''Centaurium'' was polyphyletic, made up of plants that could be gr ...

'' of the gentian familyTurner, B. L. (2011)
A new species of ''Zeltnera'' (Gentianaceae) from Tamaulipas, Mexico.
''Phytoneuron'' 61 1-3. and ''

Steviopsis nesomii ''Steviopsis nesomii'' is a species of Mexican plants in the family Asteraceae. It has been found only in the State of Nuevo León in northeastern Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in th ...

'' of the aster family.Turner, B. L. (1990)
A new species of ''Steviopsis'' (Asteraceae: Eupatorieae) from Nuevo León, México.
''Phytologia'' 68 410-12. Three genera are named in his honor: ''

Nesomia ''Nesomia'' is a genus of flowering plants in the tribe Eupatorieae within the family Asteraceae.D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: ''The Families and Genera of Vascular Plants'' vol.VIII. (Joachim W.Kadereit & Charles Jeffrey ...

'', ''

Neonesomia ''Neonesomia'' is a genus of North American flowering plants in the aster tribe within the sunflower family. The genus is named in honor of American botanist Guy L. Nesom. ; Species * '' Neonesomia johnstonii'' (G.L.Nesom) Urbatsch & R.P.Robe ...

'', and ''

Guynesomia ''Guynesomia'' is a genus of Chilean flowering plants in the tribe Astereae within the family Asteraceae.Bonifacino, Mauricio & Sancho, Gisela. 2004. Taxon 53(3): 675–678, figures 1–3, 4 [map/nowiki>.">ap">Bonifacino, Mauricio & Sancho, Gise ...

''.Turner, B. L. (1991)
''Nesomia chiapensis'' (Asteraceae-Eupatorieae), a new genus and species from Mexico.
''Phytologia'' 71 208-11.Bonifacino, Mauricio & Sancho, Gisela. 2004. Taxon 53(3): 675–678, figures 1–3, 4 [map
/nowiki>.]Urbatsch, Lowell Edward & Roberts, Roland P. 2004. Sida 21(1): 252–254
/ref>

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* 1945 births American botanical writers American male non-fiction writers Living people University of North Carolina at Chapel Hill alumni 21st-century American botanists {{US-botanist-stub