World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
32
Citations
4648
World Ranking
5897
National Ranking
1427

Research.com Recognitions

  • 1931 - Fellow of American Physical Society (APS)

Best Publications

  • Orchid phylogenomics and multiple drivers of their extraordinary diversification.

    Thomas J. Givnish;Daniel Spalink;Mercedes Ames;Stephanie P. Lyon

  • ORCHID FLORAL FRAGRANCES AND MALE EUGLOSSINE BEES: METHODS AND ADVANCES IN THE LAST SESQUIDECADE

    Norris H. Williams;W. Mark Whitten

  • Evolution along the crassulacean acid metabolism continuum

    Katia Silvera;Kurt M. Neubig;W. Mark Whitten;Norris H. Williams

  • Subtribal and generic relationships of Maxillarieae (Orchidaceae) with emphasis on Stanhopeinae: combined molecular evidence

    W. Mark Whitten;Norris H. Williams;Mark W. Chase

  • Orchid historical biogeography, diversification, Antarctica and the paradox of orchid dispersal

    Thomas J. Givnish;Daniel Spalink;Mercedes Ames;Stephanie P. Lyon

  • SELECTIVE ATTRACTION OF MALE EUGLOSSINE BEES TO ORCHID FLORAL FRAGRANCES AND ITS IMPORTANCE IN LONG DISTANCE POLLEN FLOW.

    Norris H. Williams;Calaway H. Dodson

  • Phylogenetic utility of ycf1 in orchids: a plastid gene more variable than matK

    Kurt M. Neubig;W. Mark Whitten;Barbara S. Carlsward;Mario A. Blanco;Mario A. Blanco

  • Floral Fragrances and Isolating Mechanisms in the Genus Catasetum (Orchidaceae)

    Harold G. Hills;Norris H. Williams;Calaway H. Dodson

  • Molecular phylogenetics of Vandeae (Orchidaceae) and the evolution of leaflessness.

    Barbara S. Carlsward;Barbara S. Carlsward;W. Mark Whitten;Norris H. Williams;Benny Bytebier

  • Seven New Complete Plastome Sequences Reveal Rampant Independent Loss of the ndh Gene Family across Orchids and Associated Instability of the Inverted Repeat/Small Single-Copy Region Boundaries.

    Hyoung Tae Kim;Jung Sung Kim;Michael J. Moore;Kurt M. Neubig

  • Generic recircumscriptions of Oncidiinae (Orchidaceae: Cymbidieae) based on maximum likelihood analysis of combined DNA datasets

    Kurt M. Neubig;Kurt M. Neubig;William Mark Whitten;Norris H. Williams;Norris H. Williams;Mario A. Blanco;Mario A. Blanco;Mario A. Blanco

  • Molecular phylogenetics of Maxillaria and related genera (Orchidaceae: Cymbidieae) based on combined molecular data sets

    W. Mark Whitten;Mario A. Blanco;Norris H. Williams;Samantha Koehler

  • Floral convergence in Oncidiinae (Cymbidieae; Orchidaceae): an expanded concept of Gomesa and a new genus Nohawilliamsia

    Mark W. Chase;Norris H. Williams;Aparacida Donisete de Faria;Kurt M. Neubig

  • Life History Evolution and Genome Size in Subtribe Oncidiinae (Orchidaceae)

    Mark W. Chase;Lynda Hanson;Victor A. Albert;W. Mark Whitten

  • Generic realignments in Maxillariinae (Orchidaceae)

    Mario A Blanco;German Carnevali;W. Mark Witten;Rodrigo B. Singer

  • Carvone Oxide: An Example of Convergent Evolution in Euglossine Pollinated Plants

    W. Mark Whitten;Norris H. Williams;Merle A. Battiste;Lucjan Strekowski

  • Function of glandular secretions in fragrance collection by male Euglossine bees (Apidae: Euglossini)

    Whitten Wm;Young Am;Williams Nh

  • Selective Attraction of Male Euglossine Bees to Orchid Floral Fragrances and Its Importance in Long Distance Pollen Flow

    Unknown

  • Convergent evolution of floral signals underlies the success of Neotropical orchids

    Alexander S. T. Papadopulos;Martyn P. Powell;Martyn P. Powell;Martyn P. Powell;Franco Pupulin;Jorge Warner

  • Generic circumscription and relationships in the tribe Melanthieae (Liliales, Melanthiaceae), with emphasis on Zigadenus: evidence from ITS and trnL-F sequence data

    Wendy B. Zomlefer;Norris H. Williams;W. Mark Whitten;Walter S. Judd

  • An Overview of Veratrum s.l. (Liliales: Melanthiaceae) and an Infrageneric Phylogeny Based on ITS Sequence Data

    Wendy B. Zomlefer;W. Mark Whitten;Norris H. Williams;Walter S. Judd

  • Safrole, the Main Component of the Essential Oil from Piper auritum of Panama

    Mahabir P. Gupta;Tomás D. Arias;Norris H. Williams;R. Bos

  • Molecular phylogenetics of Neotropical leafless Angraecinae (Orchidaceae): reevaluation of generic concepts.

    Barbara S. Carlsward;W. Mark Whitten;Norris H. Williams

  • Subsidiary cells in the Orchidaceae: their general distribution with special reference to development in the Oncidieae

    N. H. Williams

  • Molecular phylogeny and floral fragrances of male euglossine bee-pollinated orchids : a study of Stanhopea (Orchidaceae)

    Norris H. Williams;W. Mark Whitten

  • GENERIC RELATIONSHIPS OF ZYGOPETALINAE (ORCHIDACEAE: CYMBIDIEAE): COMBINED MOLECULAR EVIDENCE

    W. Mark Whitten;Norris H. Williams;Robert L. Dressler;Günter Gerlach

Frequent Co-Authors

W. Mark Whitten
W. Mark Whitten Florida Museum of Natural History
Robert L. Dressler
Robert L. Dressler University of Costa Rica
Mark W. Chase
Mark W. Chase Royal Botanic Gardens
John C. Cushman
John C. Cushman University of Nevada Reno
Lucjan Strekowski
Lucjan Strekowski Georgia State University
James D. Ackerman
James D. Ackerman University of Puerto Rico
Vincent Savolainen
Vincent Savolainen Imperial College London
Mary T. K. Arroyo
Mary T. K. Arroyo University of Chile
Kenneth M. Cameron
Kenneth M. Cameron University of Wisconsin–Madison
Thomas J. Givnish
Thomas J. Givnish University of Wisconsin–Madison

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