Dr. Norris H. Williams (1943, Birmingham, Alabama) es un botánico estadounidense. Se ha desarrollado como curador de plantas vasculares, cuidador de Herbario, profesor de Botánica, en el Florida Museum of Natural History. Se ha especializado en sistemática molecular, y evolución de Orchidaceae, enfatizando en el grupo Neotropical.
Pertenece a la Sociedad linneana de Londres.
Educación y carrera Termina la secundaria en el "Colegio Anniston", en 1961. Se gradúa de B.S. en Biología, en la Universidad de Alabama en 1964. En 1967 recibe su M.S. en Biología, de la misma Universidad, y en 1971 su Ph.D. en Biología, de la Universidad de Miami
Algunas publicaciones Hills, HG, NH Williams, CH Dodson. 1968. Identification of Some Orchid Fragrance Components. Amer. Orchid Soc. Bull. 37:967-971 Dodson, CH, RL Dressler, HG Hills, RM Adams, NH Williams. 1969. Biologically Active Compounds in Orchid Fragrances. Science 164:1243-1249 Williams, NH. 1970. Some Observations on Pollinaria in the Oncidiinae. Amer. Orchid Soc. Bull. 39:32-43, 207-220 Dressler, RL; NH Williams. 1970. The Genus Systeloglossum. Amer. Orchid Soc. Bull. 39:323-329 Dressler, RL; NH Williams. 1970. An Overlooked Genus in the Oncidiinae. Amer. Orchid Soc. Bull. 39:988-994 Williams, NH; CH Dodson. 1972. Selective Attraction of Male Euglossine Bees to Orchid Floral Fragrances & Its Importance in Long Distance Pollen Flow. Evolution 26:84-95 Williams, NH. 1972. A Reconsideration of Ada & the Glumaceous Brassias (Orchidaceae). Brittonia 24:93-110 Hills, HG, NH Williams, CH Dodson. 1972. Floral Fragrances & Isolating Mechanisms in the Genus Catasetum (Orchidaceae). Biotropica 4:61-76 Ayensu, ES, NH Williams. 1972. Leaf Anatomy of Palumbina & Odontoglossum Subgenus Osmoglossum. Amer. Orchid Soc. Bull. 41:687-696 Williams, NH. 1972. Additional Studies on Pollinaria in the Oncidiinae. Amer. Orchid Soc. Bull. 41:222-230 Williams, NH, RL Dressler. 1973. Oncidium Species Described by Jacquin & the Typification of Oncidium. Taxon 22:221-227 Williams, NH. 1974. Taxonomy of the Genus Aspasia Lindley (Orchidaceae: Oncidieae). Brittonia 26:333-346 Williams, NH. 1974. The Value of Plant Anatomy in Orchid Taxonomy. pp. 281-298 en M. Ospina (ed.). Proc. 7º World Orchid Conference. Medellín, Colombia Williams, NH. 1975. Stomatal Development in Ludisia Discolor (Orchidaceae): Mesoperigenous Subsidiary Cells in the Monocotyledons. Taxon 24:281-288 Dressler, RL, NH Williams. 1975. Jacquin Names - Again. Taxon 24:647-650 Dressler, RL, NH Williams. 1975. El Complejo Oncidoglossum Confusum. Orquídea 4:332-352 Williams, NH, CR Broome. 1976. Scanning Electron Microscope Studies of Orchid Pollen. Amer. Orchid Soc. Bull. 45:699-707 Williams, NH, RL Dressler. 1976. Euglossine Pollination of Spathiphyllum (Araceae). Selbyana 1:349-356 Williams, NH. 1976. Subsidiary Cell Development in the Catasetinae (Orchidaceae) & Related Groups. Bot. J. Linnean Soc. 72:299-309 Newton, GD, NH Williams. 1978. Pollen Morphology of the Cypripedioideae & the Apostasioideae (Orchidaceae). Selbyana 2:169-182 Williams, NH. 1978. Pollen Structure & the Systematics of the Neotropical Gesneriaceae. Selbyana 2:310-322 Williams, NH. 1978. A Preliminary Bibliography on Euglossine Bees & Their Relationships with Orchids & Other Plants. Selbyana 2:345-355 Atwood, JT , NH Williams. 1978. The Utility of Epidermal Cell Features in Phragmipedium & Paphiopedilum (Orchidaceae) for Determining Sterile Specimens. Selbyana 2:356-366 Williams, NH. 1979. Subsidiary Cells in the Orchidaceae: Their General Distribution with Special Reference to Development in the Oncidieae. Bot. J. Linnean Soc. 78:41-66 Atwood, JT, NH Williams. 1979. Surface Features of the Adaxial Epidermis in the Conduplicate-leaved Cypripedioideae (Orchidaceae). Bot. J. Linnean Soc. 78:141-156 Pridgeon, AM, NH Williams. 1979. Anatomical Aspects of Dresslerella (Orchidaceae). Selbyana 5:120-134 Williams, NH. 1979. Preface - The Various Contrivances by Which Orchids Are Fertilised by Insects, × Charles Darwin. Reprint of the 1862 Ed. pp. V-XI. Earl M. Coleman, Publisher Ackerman, JD, NH Williams. 1980. Pollen Morphology of the Tribe Neottieae & Its Impact on the Classification of the Orchidaceae. Grana 19:7-18 Dodson, CH, NH Williams. 1980. Konantzia, A New Genus in the Orchidaceae from Western Ecuador. Phytologia 46:387-388 Williams, NH. 1981. Floral Fragrance Components of Brassavola (Orchidaceae). Selbyana 5:279-285 Murrell, JT, NH Williams, AM Pridgeon, CH Dodson. 1981. Floral Fragrances in Angraecum (Orchidaceae). Selbyana 5:286-290 Williams, NH, JT Atwood, CH Dodson. 1981. Floral Fragrance Analysis in Anguloa, Lycaste, & Mendoncella (Orchidaceae). Selbyana 5:291-295 Ackerman, JD, NH Williams. 1981. Pollen Morphology of the Chloraeinae (Orchidaceae: Diuridae) and Related Subtribes. Am. J. Botany 68:1392-1402 Williams, NH, WM Whitten. 1982. Identification of Floral Fragrance Components of Stanhopea Embreei & Attraction of Its Pollinator to Synthetic Fragrance Compounds. Amer. Orchid Soc. Bull. 51:1262-1266 Williams, NH. 1982. The Biology of Orchids & Euglossine Bees. Pp. 119-171 en J. Arditti (ed.). Orchid Biology: Reviews & Perspectives, II. Cornell University Press. Ithaca, NY Dressler, RL, NH Williams. 1982. Proposal for the Conservation of the Generic Name 1779 Oncidium Swartz (Orchidaceae) with a Conserved Type Species, Oncidium Altissimum Sw. Taxon 31:752-754 Williams, NH. 1983. Floral Fragrances as Cues in Animal Behavior. pp. 50-72 en C.E. Jones & R.J. Little (eds.). Handbook of Exp. Poll. Biol. Van Nostrand Reinhold Company. NY Williams, NH, WM Whitten. 1983. Orchid Floral Fragrances & Male Euglossine Bees: Methods & Advances in the Last Sesquidecade. Biol. Bull. 164:355-395 Williams, NH, WM Whitten, CH Dodson. 1984. Preliminary Analyses of the Floral Fragrances of Species of Acineta, Houlletia, Lueddemannia, Lycomormium, Paphinia, & Sievekingia (Orchidaceae). Selbyana 7:315-317 Lindquist, N, MA Battiste, WM Whitten, NH Williams, L Strekowski. 1985. Trans-carvone Oxide, A Monoterpene Epoxide from the Fragrance of Catasetum. Phytochemistry 24:863-865 Williams, NH, WM Whitten, LF Pedrosa. 1985. Crystalline Production of Fragrance in Gongora Quinquenervis. Amer. Orchid Soc. Bull. 54:598-603 Gupta, MP, TD Arias, NH Williams, R Bos, DHE Tattje. 1985. Safrole, the Main Component of the Essential Oil from Piper Auritum of Panama. J. Natural Products 48:330 Williams, NH, WM Whitten. 1985. Advances & Trends in Orchid Floral Fragrance Analysis. pp.392-395 en KW Tan & J McQuery (eds.). Proc. Eleventh World Orchid Conference. Miami, Fl. Whitten, WM, NH Williams, WS Armbruster, MA Battiste, L Strekowski, N Lindquist. 1986. Carvone Oxide: An Example of Convergent Evolution in Euglossine Pollinated Plants. Systematic Botany 11:222-228 Rodríguez Caballero, RL, DE Mora, ME Barahona, NH Williams. 1986. Géneros de Orquídeas de Costa Rica. Ed. Universidad de Costa Rica. 334 pp. En adición a este Art. en castellano, hay traducción al inglés Dressler, RL, DW Hall, KD Perkins, NH Williams. 1987. Identification Manual for Wetland Plant Species of Florida. IFAS Special Publication-35. University of Florida. 297 pp. 2ª impresión 1991 Williams, NH, WM Whitten. 1988. Stanhopea panamensis, A New Species from Central Panama (Orchidaceae). Lindleyana 3:9-11 Fritze, KJ, NH Williams. 1988. The Taxonomic Significance of Pollen Morphology in the Columnea Alliance (Gesneriaceae: Gesnerioideae). Ann. Missouri Bot. Garden. 75: 168-191 Whitten, WM, HG Hills, NH Williams. 1988. Occurrence of Ipsdienol in Floral Fragrances. Phytochemistry 27:2759-2760 Whitten, WM, AM Young, NH Williams. 1989. Function of Glandular Secretions in Fragrance Collection by Male Euglossine Bees (Apidae:Euglossini). J. Chem. Ecology 15:1285-1295 Dodson, CH, NH Williams, WM Whitten. 1989. A New Species of Gongora (Orchidaceae) from Ecuador. Lindleyana 4:30-32 Hills, HG, NH Williams. 1990. Fragrance cycle of Clowesia rosea (Orchidaceae). Orquídea 12:19-22 Whitten, WM, NH Williams. 1991. A new species & nomenclatural changes in Gongora sect. Acropera (Orchidaceae: Stanhopeinae). Lindleyana 6:109-112 Whitten, WM, NH Williams. 1991. Gongora escobariana Whitten, a new species from Colombia, & the rediscovery of G. sanderiana in Peru. Orquideología 18:105-127 Whitten, WM, NH Williams. 1992. Floral fragrances of Stanhopea (Orchidaceae). Lindleyana 7:130-153 Hills, HG, NH Williams, WM Whitten. 1999. Fragrances of Catasetum. pp. 263-272 en THE WORLD OF CATASETUMS. Arthur Holst (ed.). Timber Press. Portland, Oregon Whitten, WM, NH Williams, KV Glover. 1999. Sulphuryl fluoride fumigation: effect on DNA extraction & amplification from herbarium specimens. Taxon 48:507-510 Anderson, JE, JF Preston, DW Dickson, TE Hewlett, NH Williams, JE Maruniak. 1999. Phylogenetic analysis of Pasteuria penetrans, a parasitic bacterium of root-knot nematodes, by 16s rRNA gene cloning & sequencing. J. Nematology 31:319-325 Williams, NH, WM Whitten. 1999. Molecular phylogeny & floral fragrances of male euglossine bee pollinated orchids: a study of Stanhopea. Plant Sp. Biol. 14: 129-137 Castro, HF, NH Williams, A Ogram. 2000. Phylogeny of sulfate-reducing bacteria. FEMS Microbiology Ecology 31:1-9 Whitten, WM, NH Williams, MW Chase. 2000. Subtribal & generic relationships of Maxillarieae (Orchidaceae) with emphasis on Stanhopeinae: Combined molecular evidence. Am. J. Bot. 87:1842-1856 Wood, TH, WM Whitten, NH Williams. 2000. Phylogeny of Hedychium & related genera (Zingiberaceae) based upon ITS sequence data. J. Edinburgh Bot. Garden 57:261-270 Dressler, RL, NH Williams. 2000. Chelyorchis, a new genus. P. 1130 en Romero-González, GA & G Carnevali Fernández-Concha. Orchids of Venezuela: An illustrated field guide. 2ª ed. Armitano Ed. Caracas Iudica, CA, WM Whitten, NH Williams. 2001. Small bones from dried mammal museum specimens as a reliable source of DNA. BioTechniques 30: 732-736 Sosa, V, MW Chase, G Salazar, WM Whitten, NH Williams. 2001. Phylogenetic Position of Dignathe (Orchidaceae: Oncidiinae): evidence from nuclear ITS ribosomal DNA sequences. Lindleyana 16: 94-101 Williams, NH, MW Chase, T Fulcher, WM Whitten. 2001. Molecular systematics of the Oncidiinae based on evidence from four DNA sequence regions: expanded circumscriptions of Cyrtochilum, Erycina, Otoglossum, & Trichocentrum & a new genus (Orchidaceae). Lindleyana 16: 113-139 Zomlefer, WB, NH Williams, WM Whitten, WS Judd. 2001. Generic circumscription & relationships in the tribe Melanthieae (Liliales, Melanthiaceae), with emphasis on Zigadenus: evidence from ITS and trnL-F sequence data. Am. J. Bot. 88: 1657-1669 Chase, MW, NH Williams. 2001. Additional transfers to Trichocentrum Poepp. & Endl. & Otoglossum Garay & Dunst. (Orchidaceae: Oncidiinae). Lindleyana 16: 218-219 Williams, NH, WM Whitten. 2001. Checking an orchid hybrid’s background: The use of molecular data in determining parentage of hybrids. Orchids 70: 1056-1061 Williams, NH, MW Chase, WM Whitten. 2001. Phylogenetic position of Miltoniopsis, Caucaea, a new genus, Cyrtochiloides, & relationship of Oncidium phymatochilum based on nuclear & chloroplast dna sequence data (Orchidaceae: Oncidiinae). Lindleyana 16: 272-285 Koehler, S, NH Williams, WM Whitten, ME do Amaral. 2002. Phylogeny of the Bifrenaria (Orchidaceae) complex based on morphology & sequence data from nuclear rDNA internal transcribed spacers (ITS) & chloroplast trnL-F region. Int. J. Plant Sci. 163:1055-1066. Carlsward, BS, WM Whitten, NH Williams. 2003. Molecular phylogenetics of neotropical leafless Angraecinae (Orchidaceae): reevaluation of generic concepts. Int. J. Plant Sci. 164(1): 43-51 Zomlefer, WB, WM Whitten, NH Williams, WS Judd. 2003. An overview of Veratrum (Liliales: Melanthiaceae) & an infrageneric phylogeny based on ITS sequence data. Systematic Botany 28(2): 250-269