2026 Norris H. Williams: Plant Science and Agronomy Researcher – H-Index, Publications & Awards

D-Index & Metrics

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Plant Science and Agronomy	32	5897	5526	1427	1273	76	4648

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Plant Science and Agronomy

5897

5526

1427

1273

4648

Plant Science and Agronomy

D-Index

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

557
Citations
ORCHID FLORAL FRAGRANCES AND MALE EUGLOSSINE BEES: METHODS AND ADVANCES IN THE LAST SESQUIDECADE

Norris H. Williams;W. Mark Whitten

391
Citations
Evolution along the crassulacean acid metabolism continuum

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

260
Citations
Subtribal and generic relationships of Maxillarieae (Orchidaceae) with emphasis on Stanhopeinae: combined molecular evidence

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

250
Citations
Orchid historical biogeography, diversification, Antarctica and the paradox of orchid dispersal

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

222
Citations
SELECTIVE ATTRACTION OF MALE EUGLOSSINE BEES TO ORCHID FLORAL FRAGRANCES AND ITS IMPORTANCE IN LONG DISTANCE POLLEN FLOW.

Norris H. Williams;Calaway H. Dodson

218
Citations
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

201
Citations
Floral Fragrances and Isolating Mechanisms in the Genus Catasetum (Orchidaceae)

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

173
Citations
Molecular phylogenetics of Vandeae (Orchidaceae) and the evolution of leaflessness.

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

151
Citations
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

140
Citations
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

135
Citations
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

125
Citations
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

123
Citations
Life History Evolution and Genome Size in Subtribe Oncidiinae (Orchidaceae)

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

119
Citations
Generic realignments in Maxillariinae (Orchidaceae)

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

103
Citations
Carvone Oxide: An Example of Convergent Evolution in Euglossine Pollinated Plants

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

92
Citations
Function of glandular secretions in fragrance collection by male Euglossine bees (Apidae: Euglossini)

Whitten Wm;Young Am;Williams Nh

88
Citations
Selective Attraction of Male Euglossine Bees to Orchid Floral Fragrances and Its Importance in Long Distance Pollen Flow

Unknown

87
Citations
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

84
Citations
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

76
Citations
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

63
Citations
Safrole, the Main Component of the Essential Oil from Piper auritum of Panama

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

56
Citations
Molecular phylogenetics of Neotropical leafless Angraecinae (Orchidaceae): reevaluation of generic concepts.

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

55
Citations
Subsidiary cells in the Orchidaceae: their general distribution with special reference to development in the Oncidieae

N. H. Williams

53
Citations
Molecular phylogeny and floral fragrances of male euglossine bee-pollinated orchids : a study of Stanhopea (Orchidaceae)

Norris H. Williams;W. Mark Whitten

35
Citations
GENERIC RELATIONSHIPS OF ZYGOPETALINAE (ORCHIDACEAE: CYMBIDIEAE): COMBINED MOLECULAR EVIDENCE

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

35
Citations